Display of waveforms during playback

Noob question. I see how the semitransparent white box in the bottom area sets the time span being displayed. Question: is there a way to make the playhead stay visible during playback so that is the white box moves along with the playhead, and shows the track moving to the left? What happens now is that when I hit the play button, the playhead moves along and plays the track, then moves out of view to the right. I assume that there’s a setting I have wrong somewhere. I couldn’t find info in the manual (not saying it isn’t in there.) Thanks in advance.

From the main menu bar: Transport > Follow Playhead (the shortcut is shown there)

Thank you very much. I appreciate it. Ardour is fantastic, and so is the community.