Akai MPC User Manual page 167

The upper half of the window shows narrow versions of the Tracks in that Sequence. They are for visual
reference only and are not editable.
The lower half of the window shows either the standard Grid View (as described in General Features >
Grid View) or the list view (as described in General Features > List View).
Select a Sequence by clicking the Seq drop-down menu in the upper-right corner of the window. The
Sequence's Tracks will appear in the upper half of the window. Select a Track to edit by clicking it. The
Track's grid and automation lane will appear in the grid in the lower half of the window.
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