Pre-Load Map

From Wiki001

Normally, a map is loaded once an event refers to it. This will most often happen when a player's party is moved into a new map, forcing the player to stop playing for a little while, as loading indeed takes a fair amount of time, especially for larger maps.

This event will force a map to be loaded into memory immediately, which allows creators to specifically designate when there will and will not be map loading time. This could be used at the beginning of chapters, or at the time of entering a village with several houses and buildings that lead to a bunch of other maps, forcing all the loading time to happen only once for a longer period of time, rather than several times every time a new map is introduced.