Move keyframes
You can move any keyframe to a different point in time. When you move keyframes, you move the values and settings they contain. Moving keyframes makes it easy to change the speed of animations.
You can move selected keyframes over and past surrounding keyframes. In addition, you can drag them beyond the In and Out points of the clip, but they are constrained to the limits of the source media.
Note: The first keyframe always uses the
Start Keyframe icon 
and
the last keyframe always uses the End Keyframe icon 
.
and
the last keyframe always uses the End Keyframe icon .
Use the Selection or Pen tool to do one of the
following:-
In the Timeline panel, select one or more keyframes and drag to the desired time.
-
In the Effect Controls panel, select one or more keyframe markers and drag to the desired time.
Note: When you move more than one keyframe at one time, the
selected keyframes maintain their relative distance.