Timeline Panel
Moving keyframes
Moving keyframes lets you adjust when property changes occur during playback.
Drag a keyframe left or right along the timeline to change its time. Keyframes will snap to nearby keyframes on other layers to help you align timing. You can also set a keyframe's exact time using the time input in the Properties panel when the keyframe is selected.
Next, learn about keyframe modes and keyframe easing.
Try moving keyframes yourself, below.