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DuckDuckGoEasing on a keyframe controls the transition out of that keyframe towards the next one. Applying it to the keyframe where the motion arrives changes the transition after it, not the one you were watching — this single rule explains most "easing does nothing" reports.
If one or more of these match what you are seeing, you are on the right page.
Ordered from most to least likely. Work down the list — each cause is paired with what to do about it.
Easing applies to the outgoing transition. The keyframe where motion starts controls the acceleration away; the keyframe where it ends controls the deceleration arriving. Apply the preset to the keyframe the motion leaves.
The last keyframe has no following transition to govern, so its easing has no visible effect. Apply it to the preceding keyframe instead.
Easing is per property track. Select the keyframes on every track that should share the curve, then apply — or use the bulk shortcuts F9, Ctrl+F9, Shift+F9 and Ctrl+Shift+F9 across a multi-track selection.
Hold keyframes have no interpolation at all, so no easing curve can apply. Right-click and toggle them back to standard keyframes.
Easing shapes the velocity of a change. With no change in value there is nothing to accelerate — check the values differ.
If none of the causes above match, contact support with the steps to reproduce the problem, your browser and version, and any message from the browser console. You can reach us at support@flashfx.app.
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