Ease-out curve

An ease-out curve is the reverse of ease-in: it starts fast and slows down as it arrives, like a car pulling up gently at a stop sign.

Because it responds quickly and lands softly, ease-out is the usual choice for elements entering the screen, such as a menu opening or a dialog appearing.

Entrances can take a little longer than exits, often around 200–300 ms as a starting point, because people need to see where the new element lands.