When this scrolling option is selected, the Edit window’s contents scroll continuously past the
Playhead, which is a blue line in the center of the window (or a red line when recording).
To move the Playhead to a particular location for playback, you can scroll there in a ruler (see
Scrolling in a Timebase Ruler), use the Edit window’s horizontal scroll bar, or type the location into one of the Edit Selection indicators or one of the Counters.
Moving the Playhead with these methods does not update the Timeline selection. However, updating the Timeline selection automatically moves the Playhead to the Timeline insertion point.