set-alt-down

Next: set-control-down Up: key-event Previous: get-y

`set-alt-down`

Sets whether the Alt (X) or Option (MacOS) key was down for the event. When the Alt key is pressed in Windows, it is reported as a Meta press (see set-meta-down).

(send a-key-event set-alt-down down?) -> void
down? : boolean

PLT