Seeming Size:S the most typical triggers include

the most typical triggers include touching or stepping on the glyph

or you can shape a flat surface made up of ten 10-foot-square panels

When you cast this spell using a spell slot of 9th level

and when it reverts to its normal form

Seeming Size:S the most typical triggers includeThis spell allows you to change the appearance of any number of creatures that you can see within range. You give each target you choose a new, illusory appearance. An unwilling target can make a Charisma saving throw, and if it succeeds, it is unaffected by this spell. The spell disguises physical appearance as well as clothing, armor, weapons, and equipment. You can make each creature seem 1 foot shorter or taller and appear thin, fat, or in