diff --git a/coordinator/startup.lua b/coordinator/startup.lua
index 6cfaa0e..e39d535 100644
--- a/coordinator/startup.lua
+++ b/coordinator/startup.lua
@@ -19,7 +19,7 @@ local iocontrol    = require("coordinator.iocontrol")
 local renderer     = require("coordinator.renderer")
 local sounder      = require("coordinator.sounder")
 
-local COORDINATOR_VERSION = "beta-v0.8.3"
+local COORDINATOR_VERSION = "beta-v0.8.4"
 
 local print = util.print
 local println = util.println
@@ -297,7 +297,6 @@ local function main()
                 local msg = "supervisor server timeout"
                 log_comms(msg)
                 println_ts(msg)
-                log.warning(msg)
 
                 -- close connection and UI
                 coord_comms.close()
diff --git a/coordinator/ui/components/unit_detail.lua b/coordinator/ui/components/unit_detail.lua
index 9b3d170..119071e 100644
--- a/coordinator/ui/components/unit_detail.lua
+++ b/coordinator/ui/components/unit_detail.lua
@@ -22,6 +22,7 @@ local VerticalBar       = require("graphics.elements.indicators.vbar")
 local HazardButton      = require("graphics.elements.controls.hazard_button")
 local MultiButton       = require("graphics.elements.controls.multi_button")
 local PushButton        = require("graphics.elements.controls.push_button")
+local RadioButton       = require("graphics.elements.controls.radio_button")
 local SpinboxNumeric    = require("graphics.elements.controls.spinbox_numeric")
 
 local TEXT_ALIGN = core.graphics.TEXT_ALIGN
@@ -67,6 +68,7 @@ local function init(parent, id)
 
     TextBox{parent=main,text="Reactor Unit #" .. id,alignment=TEXT_ALIGN.CENTER,height=1,fg_bg=style.header}
 
+    local bw_fg_bg  = cpair(colors.black, colors.white)
     local hzd_fg_bg = cpair(colors.white, colors.gray)
     local lu_cpair  = cpair(colors.gray, colors.gray)
 
@@ -78,25 +80,25 @@ local function init(parent, id)
     r_ps.subscribe("temp", core_map.update)
     r_ps.subscribe("size", function (s) core_map.resize(s[1], s[2]) end)
 
-    local stat_fg_bg = cpair(colors.black,colors.white)
-
-    TextBox{parent=main,x=2,y=22,text="Heating Rate",height=1,width=12,fg_bg=style.label}
-    local heating_r = DataIndicator{parent=main,x=2,label="",format="%14.0f",value=0,unit="mB/t",commas=true,lu_colors=lu_cpair,width=19,fg_bg=stat_fg_bg}
+    TextBox{parent=main,x=12,y=22,text="Heating Rate",height=1,width=12,fg_bg=style.label}
+    local heating_r = DataIndicator{parent=main,x=12,label="",format="%14.0f",value=0,unit="mB/t",commas=true,lu_colors=lu_cpair,width=19,fg_bg=bw_fg_bg}
     r_ps.subscribe("heating_rate", heating_r.update)
 
-    TextBox{parent=main,x=2,y=25,text="Commanded Burn Rate",height=1,width=19,fg_bg=style.label}
-    local burn_r = DataIndicator{parent=main,x=2,label="",format="%14.1f",value=0,unit="mB/t",lu_colors=lu_cpair,width=19,fg_bg=stat_fg_bg}
+    TextBox{parent=main,x=12,y=25,text="Commanded Burn Rate",height=1,width=19,fg_bg=style.label}
+    local burn_r = DataIndicator{parent=main,x=12,label="",format="%14.1f",value=0,unit="mB/t",lu_colors=lu_cpair,width=19,fg_bg=bw_fg_bg}
     r_ps.subscribe("burn_rate", burn_r.update)
 
-    TextBox{parent=main,text="F",x=23,y=22,width=1,height=1,fg_bg=style.label}
-    TextBox{parent=main,text="C",x=25,y=22,width=1,height=1,fg_bg=style.label}
-    TextBox{parent=main,text="H",x=27,y=22,width=1,height=1,fg_bg=style.label}
-    TextBox{parent=main,text="W",x=29,y=22,width=1,height=1,fg_bg=style.label}
+    TextBox{parent=main,text="F",x=2,y=22,width=1,height=1,fg_bg=style.label}
+    TextBox{parent=main,text="C",x=4,y=22,width=1,height=1,fg_bg=style.label}
+    TextBox{parent=main,text="\x1a",x=6,y=24,width=1,height=1,fg_bg=style.label}
+    TextBox{parent=main,text="\x1a",x=6,y=25,width=1,height=1,fg_bg=style.label}
+    TextBox{parent=main,text="H",x=8,y=22,width=1,height=1,fg_bg=style.label}
+    TextBox{parent=main,text="W",x=10,y=22,width=1,height=1,fg_bg=style.label}
 
-    local fuel  = VerticalBar{parent=main,x=23,y=23,fg_bg=cpair(colors.black,colors.gray),height=4,width=1}
-    local ccool = VerticalBar{parent=main,x=25,y=23,fg_bg=cpair(colors.blue,colors.gray),height=4,width=1}
-    local hcool = VerticalBar{parent=main,x=27,y=23,fg_bg=cpair(colors.white,colors.gray),height=4,width=1}
-    local waste = VerticalBar{parent=main,x=29,y=23,fg_bg=cpair(colors.brown,colors.gray),height=4,width=1}
+    local fuel  = VerticalBar{parent=main,x=2,y=23,fg_bg=cpair(colors.black,colors.gray),height=4,width=1}
+    local ccool = VerticalBar{parent=main,x=4,y=23,fg_bg=cpair(colors.blue,colors.gray),height=4,width=1}
+    local hcool = VerticalBar{parent=main,x=8,y=23,fg_bg=cpair(colors.white,colors.gray),height=4,width=1}
+    local waste = VerticalBar{parent=main,x=10,y=23,fg_bg=cpair(colors.brown,colors.gray),height=4,width=1}
 
     r_ps.subscribe("fuel_fill", fuel.update)
     r_ps.subscribe("ccool_fill", ccool.update)
@@ -120,27 +122,27 @@ local function init(parent, id)
     end)
 
     TextBox{parent=main,x=32,y=22,text="Core Temp",height=1,width=9,fg_bg=style.label}
-    local core_temp = DataIndicator{parent=main,x=32,label="",format="%11.2f",value=0,unit="K",lu_colors=lu_cpair,width=13,fg_bg=stat_fg_bg}
+    local core_temp = DataIndicator{parent=main,x=32,label="",format="%11.2f",value=0,unit="K",lu_colors=lu_cpair,width=13,fg_bg=bw_fg_bg}
     r_ps.subscribe("temp", core_temp.update)
 
     TextBox{parent=main,x=32,y=25,text="Burn Rate",height=1,width=9,fg_bg=style.label}
-    local act_burn_r = DataIndicator{parent=main,x=32,label="",format="%8.1f",value=0,unit="mB/t",lu_colors=lu_cpair,width=13,fg_bg=stat_fg_bg}
+    local act_burn_r = DataIndicator{parent=main,x=32,label="",format="%8.1f",value=0,unit="mB/t",lu_colors=lu_cpair,width=13,fg_bg=bw_fg_bg}
     r_ps.subscribe("act_burn_rate", act_burn_r.update)
 
     TextBox{parent=main,x=32,y=28,text="Damage",height=1,width=6,fg_bg=style.label}
-    local damage_p = DataIndicator{parent=main,x=32,label="",format="%11.0f",value=0,unit="%",lu_colors=lu_cpair,width=13,fg_bg=stat_fg_bg}
+    local damage_p = DataIndicator{parent=main,x=32,label="",format="%11.0f",value=0,unit="%",lu_colors=lu_cpair,width=13,fg_bg=bw_fg_bg}
     r_ps.subscribe("damage", damage_p.update)
 
     ---@todo radiation monitor
     TextBox{parent=main,x=32,y=31,text="Radiation",height=1,width=21,fg_bg=style.label}
-    DataIndicator{parent=main,x=32,label="",format="%7.2f",value=0,unit="mSv/h",lu_colors=lu_cpair,width=13,fg_bg=stat_fg_bg}
+    DataIndicator{parent=main,x=32,label="",format="%7.2f",value=0,unit="mSv/h",lu_colors=lu_cpair,width=13,fg_bg=bw_fg_bg}
 
     -------------------
     -- system status --
     -------------------
 
-    local u_stat = Rectangle{parent=main,border=border(1, colors.gray, true),thin=true,width=33,height=4,x=46,y=3,fg_bg=cpair(colors.black,colors.white)}
-    local stat_line_1 = TextBox{parent=u_stat,x=1,y=1,text="UNKNOWN",width=33,height=1,alignment=TEXT_ALIGN.CENTER,fg_bg=cpair(colors.black, colors.white)}
+    local u_stat = Rectangle{parent=main,border=border(1,colors.gray,true),thin=true,width=33,height=4,x=46,y=3,fg_bg=bw_fg_bg}
+    local stat_line_1 = TextBox{parent=u_stat,x=1,y=1,text="UNKNOWN",width=33,height=1,alignment=TEXT_ALIGN.CENTER,fg_bg=bw_fg_bg}
     local stat_line_2 = TextBox{parent=u_stat,x=1,y=2,text="awaiting data",width=33,height=1,alignment=TEXT_ALIGN.CENTER,fg_bg=cpair(colors.gray, colors.white)}
 
     r_ps.subscribe("U_StatusLine1", stat_line_1.set_value)
@@ -159,7 +161,7 @@ local function init(parent, id)
     local plc_hbeat  = IndicatorLight{parent=annunciator,label="PLC Heartbeat",colors=cpair(colors.white,colors.gray)}
     local r_active   = IndicatorLight{parent=annunciator,label="Active",colors=cpair(colors.green,colors.gray)}
     ---@todo auto control as info sent here
-    local r_auto     = IndicatorLight{parent=annunciator,label="Auto. Control",colors=cpair(colors.blue,colors.gray)}
+    local r_auto     = IndicatorLight{parent=annunciator,label="Automatic Control",colors=cpair(colors.blue,colors.gray)}
 
     annunciator.line_break()
 
@@ -200,14 +202,14 @@ local function init(parent, id)
     -- RPS annunciator panel
 
     TextBox{parent=main,text="REACTOR PROTECTION SYSTEM",fg_bg=cpair(colors.black,colors.cyan),alignment=TEXT_ALIGN.CENTER,width=33,height=1,x=46,y=8}
-    local rps = Rectangle{parent=main,border=border(1, colors.cyan, true),thin=true,width=33,height=12,x=46,y=9}
+    local rps = Rectangle{parent=main,border=border(1,colors.cyan,true),thin=true,width=33,height=12,x=46,y=9}
     local rps_annunc = Div{parent=rps,width=31,height=10,x=2,y=1}
 
     local rps_trp = IndicatorLight{parent=rps_annunc,label="RPS Trip",colors=cpair(colors.red,colors.gray),flash=true,period=period.BLINK_250_MS}
     local rps_dmg = IndicatorLight{parent=rps_annunc,label="Damage Critical",colors=cpair(colors.red,colors.gray),flash=true,period=period.BLINK_250_MS}
     local rps_exh = IndicatorLight{parent=rps_annunc,label="Excess Heated Coolant",colors=cpair(colors.yellow,colors.gray)}
     local rps_exw = IndicatorLight{parent=rps_annunc,label="Excess Waste",colors=cpair(colors.yellow,colors.gray)}
-    local rps_tmp = IndicatorLight{parent=rps_annunc,label="Core Temp. High",colors=cpair(colors.red,colors.gray),flash=true,period=period.BLINK_250_MS}
+    local rps_tmp = IndicatorLight{parent=rps_annunc,label="Core Temperature High",colors=cpair(colors.red,colors.gray),flash=true,period=period.BLINK_250_MS}
     local rps_nof = IndicatorLight{parent=rps_annunc,label="No Fuel",colors=cpair(colors.yellow,colors.gray)}
     local rps_noc = IndicatorLight{parent=rps_annunc,label="Coolant Level Low Low",colors=cpair(colors.yellow,colors.gray)}
     local rps_flt = IndicatorLight{parent=rps_annunc,label="PPM Fault",colors=cpair(colors.yellow,colors.gray),flash=true,period=period.BLINK_500_MS}
@@ -228,7 +230,7 @@ local function init(parent, id)
     -- cooling annunciator panel
 
     TextBox{parent=main,text="REACTOR COOLANT SYSTEM",fg_bg=cpair(colors.black,colors.blue),alignment=TEXT_ALIGN.CENTER,width=33,height=1,x=46,y=22}
-    local rcs = Rectangle{parent=main,border=border(1, colors.blue, true),thin=true,width=33,height=24,x=46,y=23}
+    local rcs = Rectangle{parent=main,border=border(1,colors.blue,true),thin=true,width=33,height=24,x=46,y=23}
     local rcs_annunc = Div{parent=rcs,width=27,height=22,x=2,y=1}
     local rcs_tags = Div{parent=rcs,width=2,height=22,x=29,y=1}
 
@@ -249,20 +251,20 @@ local function init(parent, id)
     -- boiler annunciator panel(s)
 
     if unit.num_boilers > 0 then
-        TextBox{parent=rcs_tags,x=1,y=7,text="B1",width=2,height=1,fg_bg=cpair(colors.black, colors.white)}
+        TextBox{parent=rcs_tags,x=1,y=7,text="B1",width=2,height=1,fg_bg=bw_fg_bg}
         local b1_wll = IndicatorLight{parent=rcs_annunc,label="Water Level Low",colors=cpair(colors.red,colors.gray)}
         b_ps[1].subscribe("WasterLevelLow", b1_wll.update)
 
-        TextBox{parent=rcs_tags,text="B1",width=2,height=1,fg_bg=cpair(colors.black, colors.white)}
+        TextBox{parent=rcs_tags,text="B1",width=2,height=1,fg_bg=bw_fg_bg}
         local b1_hr = IndicatorLight{parent=rcs_annunc,label="Heating Rate Low",colors=cpair(colors.yellow,colors.gray)}
         b_ps[1].subscribe("HeatingRateLow", b1_hr.update)
     end
     if unit.num_boilers > 1 then
-        TextBox{parent=rcs_tags,text="B2",width=2,height=1,fg_bg=cpair(colors.black, colors.white)}
+        TextBox{parent=rcs_tags,text="B2",width=2,height=1,fg_bg=bw_fg_bg}
         local b2_wll = IndicatorLight{parent=rcs_annunc,label="Water Level Low",colors=cpair(colors.red,colors.gray)}
         b_ps[2].subscribe("WasterLevelLow", b2_wll.update)
 
-        TextBox{parent=rcs_tags,text="B2",width=2,height=1,fg_bg=cpair(colors.black, colors.white)}
+        TextBox{parent=rcs_tags,text="B2",width=2,height=1,fg_bg=bw_fg_bg}
         local b2_hr = IndicatorLight{parent=rcs_annunc,label="Heating Rate Low",colors=cpair(colors.yellow,colors.gray)}
         b_ps[2].subscribe("HeatingRateLow", b2_hr.update)
     end
@@ -270,21 +272,21 @@ local function init(parent, id)
     -- turbine annunciator panels
 
     if unit.num_boilers == 0 then
-        TextBox{parent=rcs_tags,y=7,text="T1",width=2,height=1,fg_bg=cpair(colors.black, colors.white)}
+        TextBox{parent=rcs_tags,y=7,text="T1",width=2,height=1,fg_bg=bw_fg_bg}
     else
         rcs_tags.line_break()
         rcs_annunc.line_break()
-        TextBox{parent=rcs_tags,text="T1",width=2,height=1,fg_bg=cpair(colors.black, colors.white)}
+        TextBox{parent=rcs_tags,text="T1",width=2,height=1,fg_bg=bw_fg_bg}
     end
 
     local t1_sdo = TriIndicatorLight{parent=rcs_annunc,label="Steam Relief Valve Open",c1=colors.gray,c2=colors.yellow,c3=colors.red}
     t_ps[1].subscribe("SteamDumpOpen", function (val) t1_sdo.update(val + 1) end)
 
-    TextBox{parent=rcs_tags,text="T1",width=2,height=1,fg_bg=cpair(colors.black, colors.white)}
+    TextBox{parent=rcs_tags,text="T1",width=2,height=1,fg_bg=bw_fg_bg}
     local t1_tos = IndicatorLight{parent=rcs_annunc,label="Turbine Over Speed",colors=cpair(colors.red,colors.gray)}
     t_ps[1].subscribe("TurbineOverSpeed", t1_tos.update)
 
-    TextBox{parent=rcs_tags,text="T1",width=2,height=1,fg_bg=cpair(colors.black, colors.white)}
+    TextBox{parent=rcs_tags,text="T1",width=2,height=1,fg_bg=bw_fg_bg}
     local t1_trp = IndicatorLight{parent=rcs_annunc,label="Turbine Trip",colors=cpair(colors.red,colors.gray),flash=true,period=period.BLINK_250_MS}
     t_ps[1].subscribe("TurbineTrip", t1_trp.update)
 
@@ -292,15 +294,15 @@ local function init(parent, id)
         rcs_tags.line_break()
         rcs_annunc.line_break()
 
-        TextBox{parent=rcs_tags,text="T2",width=2,height=1,fg_bg=cpair(colors.black, colors.white)}
+        TextBox{parent=rcs_tags,text="T2",width=2,height=1,fg_bg=bw_fg_bg}
         local t2_sdo = TriIndicatorLight{parent=rcs_annunc,label="Steam Relief Valve Open",c1=colors.gray,c2=colors.yellow,c3=colors.red}
         t_ps[2].subscribe("SteamDumpOpen", function (val) t2_sdo.update(val + 1) end)
 
-        TextBox{parent=rcs_tags,text="T2",width=2,height=1,fg_bg=cpair(colors.black, colors.white)}
+        TextBox{parent=rcs_tags,text="T2",width=2,height=1,fg_bg=bw_fg_bg}
         local t2_tos = IndicatorLight{parent=rcs_annunc,label="Turbine Over Speed",colors=cpair(colors.red,colors.gray)}
         t_ps[2].subscribe("TurbineOverSpeed", t2_tos.update)
 
-        TextBox{parent=rcs_tags,text="T2",width=2,height=1,fg_bg=cpair(colors.black, colors.white)}
+        TextBox{parent=rcs_tags,text="T2",width=2,height=1,fg_bg=bw_fg_bg}
         local t2_trp = IndicatorLight{parent=rcs_annunc,label="Turbine Trip",colors=cpair(colors.red,colors.gray),flash=true,period=period.BLINK_250_MS}
         t_ps[2].subscribe("TurbineTrip", t2_trp.update)
     end
@@ -309,15 +311,15 @@ local function init(parent, id)
         rcs_tags.line_break()
         rcs_annunc.line_break()
 
-        TextBox{parent=rcs_tags,text="T3",width=2,height=1,fg_bg=cpair(colors.black, colors.white)}
+        TextBox{parent=rcs_tags,text="T3",width=2,height=1,fg_bg=bw_fg_bg}
         local t3_sdo = TriIndicatorLight{parent=rcs_annunc,label="Steam Relief Valve Open",c1=colors.gray,c2=colors.yellow,c3=colors.red}
         t_ps[3].subscribe("SteamDumpOpen", function (val) t3_sdo.update(val + 1) end)
 
-        TextBox{parent=rcs_tags,text="T3",width=2,height=1,fg_bg=cpair(colors.black, colors.white)}
+        TextBox{parent=rcs_tags,text="T3",width=2,height=1,fg_bg=bw_fg_bg}
         local t3_tos = IndicatorLight{parent=rcs_annunc,label="Turbine Over Speed",colors=cpair(colors.red,colors.gray)}
         t_ps[3].subscribe("TurbineOverSpeed", t3_tos.update)
 
-        TextBox{parent=rcs_tags,text="T3",width=2,height=1,fg_bg=cpair(colors.black, colors.white)}
+        TextBox{parent=rcs_tags,text="T3",width=2,height=1,fg_bg=bw_fg_bg}
         local t3_trp = IndicatorLight{parent=rcs_annunc,label="Turbine Trip",colors=cpair(colors.red,colors.gray),flash=true,period=period.BLINK_250_MS}
         t_ps[3].subscribe("TurbineTrip", t3_trp.update)
     end
@@ -326,8 +328,8 @@ local function init(parent, id)
     -- reactor controls --
     ----------------------
 
-    local burn_control = Div{parent=main,x=2,y=28,width=19,height=3,fg_bg=cpair(colors.gray,colors.white)}
-    local burn_rate = SpinboxNumeric{parent=burn_control,x=2,y=1,whole_num_precision=4,fractional_precision=1,arrow_fg_bg=cpair(colors.gray,colors.white),fg_bg=cpair(colors.black,colors.white)}
+    local burn_control = Div{parent=main,x=12,y=28,width=19,height=3,fg_bg=cpair(colors.gray,colors.white)}
+    local burn_rate = SpinboxNumeric{parent=burn_control,x=2,y=1,whole_num_precision=4,fractional_precision=1,arrow_fg_bg=cpair(colors.gray,colors.white),fg_bg=bw_fg_bg}
     TextBox{parent=burn_control,x=9,y=2,text="mB/t"}
 
     local set_burn = function () unit.set_burn(burn_rate.get_value()) end
@@ -338,7 +340,7 @@ local function init(parent, id)
 
     local dis_colors = cpair(colors.white, colors.lightGray)
 
-    local start = HazardButton{parent=main,x=22,y=28,text="START",accent=colors.lightBlue,dis_colors=dis_colors,callback=unit.start,fg_bg=hzd_fg_bg}
+    local start = HazardButton{parent=main,x=2,y=28,text="START",accent=colors.lightBlue,dis_colors=dis_colors,callback=unit.start,fg_bg=hzd_fg_bg}
     local ack_a = HazardButton{parent=main,x=12,y=32,text="ACK \x13",accent=colors.orange,dis_colors=dis_colors,callback=unit.ack_alarms,fg_bg=hzd_fg_bg}
     local scram = HazardButton{parent=main,x=2,y=32,text="SCRAM",accent=colors.yellow,dis_colors=dis_colors,callback=unit.scram,fg_bg=hzd_fg_bg}
     local reset = HazardButton{parent=main,x=22,y=32,text="RESET",accent=colors.red,dis_colors=dis_colors,callback=unit.reset_rps,fg_bg=hzd_fg_bg}
@@ -360,7 +362,7 @@ local function init(parent, id)
     r_ps.subscribe("rps_tripped", function (active) if active then reset.enable() else reset.disable() end end)
 
     TextBox{parent=main,text="WASTE PROCESSING",fg_bg=cpair(colors.black,colors.brown),alignment=TEXT_ALIGN.CENTER,width=33,height=1,x=46,y=48}
-    local waste_proc = Rectangle{parent=main,border=border(1, colors.brown, true),thin=true,width=33,height=3,x=46,y=49}
+    local waste_proc = Rectangle{parent=main,border=border(1,colors.brown,true),thin=true,width=33,height=3,x=46,y=49}
     local waste_div = Div{parent=waste_proc,x=2,y=1,width=31,height=1}
 
     local waste_mode = MultiButton{parent=waste_div,x=1,y=1,options=waste_opts,callback=unit.set_waste,min_width=6}
@@ -371,7 +373,7 @@ local function init(parent, id)
     -- alarm management --
     ----------------------
 
-    local alarm_panel = Div{parent=main,x=2,y=36,width=29,height=16,fg_bg=cpair(colors.black,colors.white)}
+    local alarm_panel = Div{parent=main,x=2,y=36,width=29,height=16,fg_bg=bw_fg_bg}
 
     local a_brc = AlarmLight{parent=alarm_panel,x=6,y=2,label="Containment Breach",c1=colors.gray,c2=colors.red,c3=colors.green,flash=true,period=period.BLINK_250_MS}
     local a_rad = AlarmLight{parent=alarm_panel,x=6,label="Containment Radiation",c1=colors.gray,c2=colors.red,c3=colors.green,flash=true,period=period.BLINK_250_MS}
@@ -410,38 +412,70 @@ local function init(parent, id)
     local rst_fg_bg = cpair(colors.black, colors.lime)
     local active_fg_bg = cpair(colors.white, colors.gray)
 
-    PushButton{parent=alarm_panel,x=2,y=2,text="\x13",min_width=1,callback=c.c_breach.ack,fg_bg=ack_fg_bg,active_fg_bg=active_fg_bg}
-    PushButton{parent=alarm_panel,x=4,y=2,text="R",min_width=1,callback=c.c_breach.reset,fg_bg=rst_fg_bg,active_fg_bg=active_fg_bg}
-    PushButton{parent=alarm_panel,x=2,y=3,text="\x13",min_width=1,callback=c.radiation.ack,fg_bg=ack_fg_bg,active_fg_bg=active_fg_bg}
-    PushButton{parent=alarm_panel,x=4,y=3,text="R",min_width=1,callback=c.radiation.reset,fg_bg=rst_fg_bg,active_fg_bg=active_fg_bg}
-    PushButton{parent=alarm_panel,x=2,y=4,text="\x13",min_width=1,callback=c.dmg_crit.ack,fg_bg=ack_fg_bg,active_fg_bg=active_fg_bg}
-    PushButton{parent=alarm_panel,x=4,y=4,text="R",min_width=1,callback=c.dmg_crit.reset,fg_bg=rst_fg_bg,active_fg_bg=active_fg_bg}
+    PushButton{parent=alarm_panel,x=2,y=2,text="\x13",callback=c.c_breach.ack,fg_bg=ack_fg_bg,active_fg_bg=active_fg_bg}
+    PushButton{parent=alarm_panel,x=4,y=2,text="R",callback=c.c_breach.reset,fg_bg=rst_fg_bg,active_fg_bg=active_fg_bg}
+    PushButton{parent=alarm_panel,x=2,y=3,text="\x13",callback=c.radiation.ack,fg_bg=ack_fg_bg,active_fg_bg=active_fg_bg}
+    PushButton{parent=alarm_panel,x=4,y=3,text="R",callback=c.radiation.reset,fg_bg=rst_fg_bg,active_fg_bg=active_fg_bg}
+    PushButton{parent=alarm_panel,x=2,y=4,text="\x13",callback=c.dmg_crit.ack,fg_bg=ack_fg_bg,active_fg_bg=active_fg_bg}
+    PushButton{parent=alarm_panel,x=4,y=4,text="R",callback=c.dmg_crit.reset,fg_bg=rst_fg_bg,active_fg_bg=active_fg_bg}
 
-    PushButton{parent=alarm_panel,x=2,y=6,text="\x13",min_width=1,callback=c.r_lost.ack,fg_bg=ack_fg_bg,active_fg_bg=active_fg_bg}
-    PushButton{parent=alarm_panel,x=4,y=6,text="R",min_width=1,callback=c.r_lost.reset,fg_bg=rst_fg_bg,active_fg_bg=active_fg_bg}
-    PushButton{parent=alarm_panel,x=2,y=7,text="\x13",min_width=1,callback=c.damage.ack,fg_bg=ack_fg_bg,active_fg_bg=active_fg_bg}
-    PushButton{parent=alarm_panel,x=4,y=7,text="R",min_width=1,callback=c.damage.reset,fg_bg=rst_fg_bg,active_fg_bg=active_fg_bg}
-    PushButton{parent=alarm_panel,x=2,y=8,text="\x13",min_width=1,callback=c.over_temp.ack,fg_bg=ack_fg_bg,active_fg_bg=active_fg_bg}
-    PushButton{parent=alarm_panel,x=4,y=8,text="R",min_width=1,callback=c.over_temp.reset,fg_bg=rst_fg_bg,active_fg_bg=active_fg_bg}
-    PushButton{parent=alarm_panel,x=2,y=9,text="\x13",min_width=1,callback=c.high_temp.ack,fg_bg=ack_fg_bg,active_fg_bg=active_fg_bg}
-    PushButton{parent=alarm_panel,x=4,y=9,text="R",min_width=1,callback=c.high_temp.reset,fg_bg=rst_fg_bg,active_fg_bg=active_fg_bg}
-    PushButton{parent=alarm_panel,x=2,y=10,text="\x13",min_width=1,callback=c.waste_leak.ack,fg_bg=ack_fg_bg,active_fg_bg=active_fg_bg}
-    PushButton{parent=alarm_panel,x=4,y=10,text="R",min_width=1,callback=c.waste_leak.reset,fg_bg=rst_fg_bg,active_fg_bg=active_fg_bg}
-    PushButton{parent=alarm_panel,x=2,y=11,text="\x13",min_width=1,callback=c.waste_high.ack,fg_bg=ack_fg_bg,active_fg_bg=active_fg_bg}
-    PushButton{parent=alarm_panel,x=4,y=11,text="R",min_width=1,callback=c.waste_high.reset,fg_bg=rst_fg_bg,active_fg_bg=active_fg_bg}
+    PushButton{parent=alarm_panel,x=2,y=6,text="\x13",callback=c.r_lost.ack,fg_bg=ack_fg_bg,active_fg_bg=active_fg_bg}
+    PushButton{parent=alarm_panel,x=4,y=6,text="R",callback=c.r_lost.reset,fg_bg=rst_fg_bg,active_fg_bg=active_fg_bg}
+    PushButton{parent=alarm_panel,x=2,y=7,text="\x13",callback=c.damage.ack,fg_bg=ack_fg_bg,active_fg_bg=active_fg_bg}
+    PushButton{parent=alarm_panel,x=4,y=7,text="R",callback=c.damage.reset,fg_bg=rst_fg_bg,active_fg_bg=active_fg_bg}
+    PushButton{parent=alarm_panel,x=2,y=8,text="\x13",callback=c.over_temp.ack,fg_bg=ack_fg_bg,active_fg_bg=active_fg_bg}
+    PushButton{parent=alarm_panel,x=4,y=8,text="R",callback=c.over_temp.reset,fg_bg=rst_fg_bg,active_fg_bg=active_fg_bg}
+    PushButton{parent=alarm_panel,x=2,y=9,text="\x13",callback=c.high_temp.ack,fg_bg=ack_fg_bg,active_fg_bg=active_fg_bg}
+    PushButton{parent=alarm_panel,x=4,y=9,text="R",callback=c.high_temp.reset,fg_bg=rst_fg_bg,active_fg_bg=active_fg_bg}
+    PushButton{parent=alarm_panel,x=2,y=10,text="\x13",callback=c.waste_leak.ack,fg_bg=ack_fg_bg,active_fg_bg=active_fg_bg}
+    PushButton{parent=alarm_panel,x=4,y=10,text="R",callback=c.waste_leak.reset,fg_bg=rst_fg_bg,active_fg_bg=active_fg_bg}
+    PushButton{parent=alarm_panel,x=2,y=11,text="\x13",callback=c.waste_high.ack,fg_bg=ack_fg_bg,active_fg_bg=active_fg_bg}
+    PushButton{parent=alarm_panel,x=4,y=11,text="R",callback=c.waste_high.reset,fg_bg=rst_fg_bg,active_fg_bg=active_fg_bg}
 
-    PushButton{parent=alarm_panel,x=2,y=13,text="\x13",min_width=1,callback=c.rps_trans.ack,fg_bg=ack_fg_bg,active_fg_bg=active_fg_bg}
-    PushButton{parent=alarm_panel,x=4,y=13,text="R",min_width=1,callback=c.rps_trans.reset,fg_bg=rst_fg_bg,active_fg_bg=active_fg_bg}
-    PushButton{parent=alarm_panel,x=2,y=14,text="\x13",min_width=1,callback=c.rcs_trans.ack,fg_bg=ack_fg_bg,active_fg_bg=active_fg_bg}
-    PushButton{parent=alarm_panel,x=4,y=14,text="R",min_width=1,callback=c.rcs_trans.reset,fg_bg=rst_fg_bg,active_fg_bg=active_fg_bg}
-    PushButton{parent=alarm_panel,x=2,y=15,text="\x13",min_width=1,callback=c.t_trip.ack,fg_bg=ack_fg_bg,active_fg_bg=active_fg_bg}
-    PushButton{parent=alarm_panel,x=4,y=15,text="R",min_width=1,callback=c.t_trip.reset,fg_bg=rst_fg_bg,active_fg_bg=active_fg_bg}
+    PushButton{parent=alarm_panel,x=2,y=13,text="\x13",callback=c.rps_trans.ack,fg_bg=ack_fg_bg,active_fg_bg=active_fg_bg}
+    PushButton{parent=alarm_panel,x=4,y=13,text="R",callback=c.rps_trans.reset,fg_bg=rst_fg_bg,active_fg_bg=active_fg_bg}
+    PushButton{parent=alarm_panel,x=2,y=14,text="\x13",callback=c.rcs_trans.ack,fg_bg=ack_fg_bg,active_fg_bg=active_fg_bg}
+    PushButton{parent=alarm_panel,x=4,y=14,text="R",callback=c.rcs_trans.reset,fg_bg=rst_fg_bg,active_fg_bg=active_fg_bg}
+    PushButton{parent=alarm_panel,x=2,y=15,text="\x13",callback=c.t_trip.ack,fg_bg=ack_fg_bg,active_fg_bg=active_fg_bg}
+    PushButton{parent=alarm_panel,x=4,y=15,text="R",callback=c.t_trip.reset,fg_bg=rst_fg_bg,active_fg_bg=active_fg_bg}
 
     -- color tags
 
-    TextBox{parent=alarm_panel,x=5,y=13,text="\x95",width=1,height=1,fg_bg=cpair(colors.white, colors.cyan)}
-    TextBox{parent=alarm_panel,x=5,text="\x95",width=1,height=1,fg_bg=cpair(colors.white, colors.blue)}
-    TextBox{parent=alarm_panel,x=5,text="\x95",width=1,height=1,fg_bg=cpair(colors.white, colors.blue)}
+    TextBox{parent=alarm_panel,x=5,y=13,text="\x95",width=1,height=1,fg_bg=cpair(colors.white,colors.cyan)}
+    TextBox{parent=alarm_panel,x=5,text="\x95",width=1,height=1,fg_bg=cpair(colors.white,colors.blue)}
+    TextBox{parent=alarm_panel,x=5,text="\x95",width=1,height=1,fg_bg=cpair(colors.white,colors.blue)}
+
+    --------------------------------
+    -- automatic control settings --
+    --------------------------------
+
+    TextBox{parent=main,text="AUTO CTRL",fg_bg=cpair(colors.black,colors.purple),alignment=TEXT_ALIGN.CENTER,width=13,height=1,x=32,y=36}
+    local auto_ctl = Rectangle{parent=main,border=border(1,colors.purple,true),thin=true,width=13,height=15,x=32,y=37}
+    local auto_div = Div{parent=auto_ctl,width=13,height=15,x=2,y=1}
+
+    local ctl_opts = { "Manual", "Group A", "Group B", "Group C", "Group D" }
+
+    local a_prm, a_stb
+    local test = function (val)
+        a_prm.update(val ~= 1)
+        a_stb.update(val ~= 1)
+    end
+
+    RadioButton{parent=auto_div,options=ctl_opts,callback=test,radio_colors=cpair(colors.blue,colors.white),radio_bg=colors.gray}
+
+    auto_div.line_break()
+
+    PushButton{parent=auto_div,text="SET",x=3,min_width=5,fg_bg=cpair(colors.black,colors.white),active_fg_bg=cpair(colors.white,colors.gray),callback=function()end}
+
+    auto_div.line_break()
+
+    TextBox{parent=auto_div,text="CRD Group",height=1,width=9,fg_bg=style.label}
+    local auto_grp = TextBox{parent=auto_div,text="Manual",height=1,width=9,fg_bg=bw_fg_bg}
+
+    auto_div.line_break()
+
+    a_prm = IndicatorLight{parent=auto_div,label="Primary",colors=cpair(colors.green,colors.gray)}
+    a_stb = IndicatorLight{parent=auto_div,label="Standby",colors=cpair(colors.white,colors.gray)}
 
     return main
 end
diff --git a/graphics/element.lua b/graphics/element.lua
index 32a67a7..fdd0bfe 100644
--- a/graphics/element.lua
+++ b/graphics/element.lua
@@ -24,6 +24,7 @@ local element = {}
 ---|hazard_button_args
 ---|multi_button_args
 ---|push_button_args
+---|radio_button_args
 ---|spinbox_args
 ---|switch_button_args
 ---|alarm_indicator_light
diff --git a/graphics/elements/controls/multi_button.lua b/graphics/elements/controls/multi_button.lua
index c92e9f4..2cf583a 100644
--- a/graphics/elements/controls/multi_button.lua
+++ b/graphics/elements/controls/multi_button.lua
@@ -1,4 +1,4 @@
--- Button Graphics Element
+-- Multi Button Graphics Element
 
 local util    = require("scada-common.util")
 
@@ -15,7 +15,7 @@ local element = require("graphics.element")
 ---@class multi_button_args
 ---@field options table button options
 ---@field callback function function to call on touch
----@field default? boolean default state, defaults to options[1]
+---@field default? integer default state, defaults to options[1]
 ---@field min_width? integer text length + 2 if omitted
 ---@field parent graphics_element
 ---@field id? string element id
@@ -29,7 +29,12 @@ local element = require("graphics.element")
 ---@return graphics_element element, element_id id
 local function multi_button(args)
     assert(type(args.options) == "table", "graphics.elements.controls.multi_button: options is a required field")
+    assert(#args.options > 0, "graphics.elements.controls.multi_button: at least one option is required")
     assert(type(args.callback) == "function", "graphics.elements.controls.multi_button: callback is a required field")
+    assert(type(args.default) == "nil" or (type(args.default) == "number" and args.default > 0),
+        "graphics.elements.controls.multi_button: default must be nil or a number > 0")
+    assert(type(args.min_width) == "nil" or (type(args.min_width) == "number" and args.min_width > 0),
+        "graphics.elements.controls.multi_button: min_width must be nil or a number > 0")
 
     -- single line
     args.height = 1
@@ -43,7 +48,7 @@ local function multi_button(args)
         end
     end
 
-    local button_width = math.max(max_width, args.min_width or 1)
+    local button_width = math.max(max_width, args.min_width or 0)
 
     args.width = (button_width * #args.options) + #args.options + 1
 
diff --git a/graphics/elements/controls/radio_button.lua b/graphics/elements/controls/radio_button.lua
new file mode 100644
index 0000000..025cad1
--- /dev/null
+++ b/graphics/elements/controls/radio_button.lua
@@ -0,0 +1,108 @@
+-- Radio Button Graphics Element
+
+local element = require("graphics.element")
+
+---@class radio_button_args
+---@field options table button options
+---@field callback function function to call on touch
+---@field radio_colors cpair colors for radio button center dot when active (a) or inactive (b)
+---@field radio_bg color background color of radio button
+---@field default? integer default state, defaults to options[1]
+---@field min_width? integer text length + 2 if omitted
+---@field parent graphics_element
+---@field id? string element id
+---@field x? integer 1 if omitted
+---@field y? integer 1 if omitted
+---@field fg_bg? cpair foreground/background colors
+
+-- new radio button list (latch selection, exclusively one button at a time)
+---@param args radio_button_args
+---@return graphics_element element, element_id id
+local function radio_button(args)
+    assert(type(args.options) == "table", "graphics.elements.controls.radio_button: options is a required field")
+    assert(#args.options > 0, "graphics.elements.controls.radio_button: at least one option is required")
+    assert(type(args.callback) == "function", "graphics.elements.controls.radio_button: callback is a required field")
+    assert(type(args.default) == "nil" or (type(args.default) == "number" and args.default > 0),
+        "graphics.elements.controls.radio_button: default must be nil or a number > 0")
+    assert(type(args.min_width) == "nil" or (type(args.min_width) == "number" and args.min_width > 0),
+        "graphics.elements.controls.radio_button: min_width must be nil or a number > 0")
+
+    -- one line per option
+    args.height = #args.options
+
+    -- determine widths
+    local max_width = 1
+    for i = 1, #args.options do
+        local opt = args.options[i] ---@type string
+        if string.len(opt) > max_width then
+            max_width = string.len(opt)
+        end
+    end
+
+    local button_text_width = math.max(max_width, args.min_width or 0)
+
+    args.width = button_text_width + 2
+
+    -- create new graphics element base object
+    local e = element.new(args)
+
+    -- button state (convert nil to 1 if missing)
+    e.value = args.default or 1
+
+    -- show the button state
+    local function draw()
+        for i = 1, #args.options do
+            local opt = args.options[i] ---@type string
+
+            e.window.setCursorPos(1, i)
+
+            if e.value == i then
+                -- show as selected
+                e.window.setTextColor(args.radio_colors.color_a)
+                e.window.setBackgroundColor(args.radio_bg)
+            else
+                -- show as unselected
+                e.window.setTextColor(args.radio_colors.color_b)
+                e.window.setBackgroundColor(args.radio_bg)
+            end
+
+            e.window.write("\x88")
+
+            e.window.setTextColor(args.radio_bg)
+            e.window.setBackgroundColor(e.fg_bg.bkg)
+            e.window.write("\x95")
+
+            -- write button text
+            e.window.setTextColor(e.fg_bg.fgd)
+            e.window.setBackgroundColor(e.fg_bg.bkg)
+            e.window.write(opt)
+        end
+    end
+
+    -- handle touch
+    ---@param event monitor_touch monitor touch event
+    function e.handle_touch(event)
+        -- determine what was pressed
+        if e.enabled then
+            if args.options[event.y] ~= nil then
+                e.value = event.y
+                draw()
+                args.callback(e.value)
+            end
+        end
+    end
+
+    -- set the value
+    ---@param val integer new value
+    function e.set_value(val)
+        e.value = val
+        draw()
+    end
+
+    -- initial draw
+    draw()
+
+    return e.get()
+end
+
+return radio_button