1. The overview bar (right above the track) shows the track's data while you're scrolling the editor. This works for all editors except for the Song Editor. So it does work for track editors, the Automated Fader effect, MIDI controller editors, the tempo editor and the time signature editor.
An editor typically shows just a couple of seconds of data. You can now see the whole song while scrolling.
2. The Chords keyboard allows for playing major or minor chords with just one finger. You can use a second finger to add a 6, 7 of major 7. The narrow vertical slider sets "the position of the keyboard player's hand on the keyboard".
Giel Bremmers