Selecting Tracks
In certain situations such as editing and composing, you can select a group of tracks to be processed instead of having to process all tracks.
To select a single track, click it's track number.
To select a range of tracks, click the track number of the first track you wish to select then hold down the Shift key and click the last track number.
To select and unselect individual tracks while leaving existing tracks selected, hold down the Ctrl key when clicking the track number to toggle that track's selection status. Use this to add tracks to a selection one at a time.
You can even combine these methods. By holding down both the Ctrl and Shift keys, you can add a range of tracks to an existing selection.
Also, you can select instrument, drum or MIDI tracks via the Select menu.