effect
effect(self: none, fn, visible-subslides, cont, is-method: false)(source)Take effect in some subslides.
Example: #effect(text.with(fill: red), "2-")[Something] will display [Something] if the current slide is 2 or later.
You can also add an abbreviation by using #let effect-red = effect.with(text.with(fill: red)) for your own effects.