Arrangement
At the center of the studio you find the Arrangement with the Timeline, Loop Indicators and Playhead.
The Arrangement is the area where you drop in library regions to tracks, record your own audio or note content and create new empty regions.
Right above the Arrangement you have the Timeline, looking a bit like a ruler with measures in musical bars. You can click here to move the Playhead around or use the green Loop Indicators to repeat/loop a certain section of your song.