TriggerKey

All comments in LUA start with a --
The TriggerKey option is used to specify which key will trigger the script. The option will only have an effect if the TriggerType is set to Key.
-- TriggerKey=f
In the above example, the pushing the f key will trigger the script to run. The case of the letter is important. If you want the script to trigger with the key combination Shift + f, then you would specify the trigger key as F.
-- TriggerKey=F
Certain keys can not be used to trigger the script such as the Escape, Return, Function or Backspace keys.