Rewind

Places the position indicator at the first frame of the effect.

Fast Forward

Places the position indicator at the last frame of the effect.

Add Keyframe

Creates a keyframe at the current position of the position indicator in the effect's position bar.

Alt+click (Windows) or Option+click (Macintosh) to delete the selected keyframe.

Step Backward

Moves the position indicator one frame backward.

Step Forward

Moves the position indicator one frame forward.

Play

Plays the effect from the current position in the effect's position bar. Click again or press the space bar to stop play.

Rendered effects play at full speed. Most unrendered effects play at full speed when Real-Time Effects is enabled. Effects play at single-frame rate in other circumstances. For more information, see Real-Time Preview of Video Effects.

Play Preview

Plays back a wire-frame preview of an unrendered effect.

Play Loop

Plays back the current effect repeatedly in a loop. Click again or press the space bar to stop play.

Rendered effects play at full speed. Most unrendered effects play at full speed when Real-Time Effects is enabled. Effects play at single-frame rate in other circumstances. For more information, see Real-Time Preview of Video Effects.

Dual Split

Click to divide the Effect Preview monitor in half, showing the image with and without the effect applied. Click again to remove.

Reduce

Reduces the size of the image in the Effect Preview monitor.

Enlarge

Enlarges the size of the image in the Effect Preview monitor.

You can also Ctrl+click (Windows) or Command+click (Macintosh) in the Effect Preview monitor to enlarge the image.