Easing

Easing controls how fast a property changes as it moves between keyframes. A Linear keyframe moves at a constant linear speed, an Eased keyframe eases in and out, and Hold skips transition entirely. Every Eased keyframe has editable handles that let you dial in its curve precisely in the Graph Editor.

Press F9 to apply Easy Ease to selected keyframes — a reasonable default S-curve. Copy and paste easing between keyframes with ⌘⌥C and ⌘⌥V, or paste just the values (without easing) with ⌘⌥X. You can also right-click one or multiple keyframes and copy/paste easing values from the context menu.

Fine-tune curves in the Graph Editor — press G to open it — where keyframe handles become draggable.

⌘⌥-click one or multiple keyframes in the Timeline or Graph Editor to quickly cycle between Linear, Eased, and Hold.

Keyframes can also be copied and pasted between layers, as long as the source and destination are the same property.