Using the Option Key to Temporarily Enable Pen Tools
When using the Selection tool, holding down the Option key and moving the pointer
over the audio level overlay in the Timeline makes the Pen tool the active tool. This is a
fast and easy way to create keyframes to adjust your levels.
Holding down the Option key and moving the pointer to an existing keyframe
temporarily enables the Delete Point tool, so that you can quickly delete keyframes
you don’t want.