To designate an event page where the event's position is randomized, create
a comment and write
<random position region: x type>For some region ID xThe type determines when position randomization occurs
start - only once: when the event is first createdinit - whenever the event is createdpage - whenever you change to that pageIf that page is active when the map is loaded, then the event will be randomlymoved to a tile in that region.
This is applied to events on a per-page basis, so you may need to add the