You can set the point when a Player view or the fullscreen Player updates its display.
You can set the playback point when the fullscreen Player updates only if you entered it through a Player view.
To set the playback point when the Player updates its display:
Update on Play Select this button to update the image at each frame when you play the composition. Deselect to update the image only when you stop playing the composition, and only at the scrub frames when you scrub through the composition.