Quick Tips for iMovie

0. How to close the event library panel:
Click the left-bottom button.

1. To play video from any point:
--Rest the pointer at the point where you want it to begin playing, and then press the Space bar; or
--Double-click.

2. To adjust a frame range selection, do one of the following:
--Drag the handle on either end of the selection border to extend or reduce the selection; or
--Place the pointer over the desired startpoint or endpoint and click while holding down the Shift key.

3. To trim a video clip, do one of the following:
--Hold down the Command and Option keys. When the orange selection handle appears at the end of the clip, drag the selection handle right or left to extend or reduce the clip duration by one-frame increments.
--Hold down the Option key while pressing the Left Arrow or Right Arrow key to extend or reduce the clip duration by one-frame increments.

4. To change the duration of transition:
--Highlight the transition and select Edit>Set duration.