Native Instruments MASCHINE MK3 Manual page 753

Working with the Arranger
Arranger Basics
Navigating the Arranger Vertically (Groups)
A classic scroll bar is available right of the Arranger. It allows you to scroll to hidden Groups in
case all of them don't fit in the Arranger.
The classic scroll bar right of the Arranger.
You can also adjust the height of the Arranger in order to display more/less Groups at once by
dragging its bottom right corner vertically with your mouse:
Drag the handle to adjust the Arranger's height.
MASCHINE - Manual - 753