This lists the tracks and busses that are present in the session. The list order reflects the order in the editor, and track or bus names can be dragged-and-dropped in the editor list to re-order them in the editor. The columns in the list represent the following:
V | whether the track or bus is visible; they can be hidden, in which case they will still play, but just not be visible in the editor; this can be useful for keeping the display uncluttered. |
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A | whether the track or bus is active; inactive tracks will not play, and will not consume any CPU. |
I | for MIDI tracks, whether the MIDI input is enabled; this dictates whether MIDI data from the track's input ports will be passed through the track. |
R | whether the track is record-enabled. |
RS | whether the track is record safe; a record safe track cannot be armed for recording, to protect against a mistake. |
M | whether the track is muted. |
S | track solo state. |
SI | track solo-isolated state. |
SS | solo safe state. |
Each icon in these columns can be clicked to toggle the track/bus state, which is a very fast way to set multiple tracks/busses state at once.
As with the region list, hovering the mouse pointer over a column heading shows a tool-tip which can be handy to remember what the columns are for.