With this function you can choose to enable (true) or disable (false) the draw event for all instances in the game, thus giving you control over how and when things are draw, useful if you wish to implement a "frame skip" technique. Note that this doesn't just prevent instances drawing to the screen, it suppresses the draw event completely meaning that care should be taken since any game logic that is present in that event will not be run either.
Argument Description Enable Set to true or false.
if (frame_skip mod 5) == 0
The above code checks a variable and if it returns true, it enables the draw event, otherwise the draw event is disabled.