No interpolation
No interpolation is the state in which there are no keyframes for a layer property--when the stopwatch is turned off and the I-beam icon ( ) displays in the Timeline window under the current-time marker. In this state, when you set the value of a layer property, it maintains that value for the layer's duration, unless overridden by an expression. By default, no interpolation is applied to a layer property. If any keyframes are present for a layer property, some kind of interpolation is in use. Removing all keyframes from a layer property also removes all interpolation methods from the layer property.
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