- While keeping your aim steadily on target press and hold <kbd>Tab ↹</kbd> (ACE3 default key bind `Lock Target [Hold]`).
- When the sound changes and a cross appears on the screen the target is locked and you're able to fire.
### 2.2 Switching fire mode
- For this feature you need to have a compatible launcher.
- When aiming with your launcher press <kbd>Ctrl</kbd> + <kbd>Tab ↹</kbd>.
- On the right side of the screen (for most launchers) you should see that `TOP`is now illumiated in green which means that your missile will be fired in top down mode.