The Track menu is where one can deal with the tracks, busses and control masters.

Add Track, Bus or VCA...

Shows the Add Track, Bus or VCA... window, where one can add one or more tracks, busses or control masters to the session and define its parameters

Duplicate Tracks/Busses...

Shows the Duplicate Tracks and Busses window, allowing to duplicate the selected track(s) and optionnaly, its playlist

Toggle Record Enable

Sets the Record Enable mode On on the selected track(s). These tracks will record audio/midi next time the global record is active and playback is started.

Toggle Solo

Sets the solo On on the selected tracks, so only these tracks will play

Toggle Mute

Mutes the selected tracks, they wont play until unmuted

Insert Time

Shows the Insert Time window, allowing to insert a blank time in the selected tracks' playlist. By default, it'll be inserted at the Edit Point, but that can be changed in the dialog, as does the behaviour of the regions

Remove Time

Same as above, but to remove time

Move Selected Tracks Up

Changes the position of the selected tracks one track up towards the top. In the mixer, the tracks will be moved to the left.

Move Selected Tracks Down

Same as above, towards the bottom

Height

Fit Selection (Vertical)

Will fit the selected track(s) in the window. If too many tracks are selected, they'll be reduced to their minimum height.

Largest

Sets the selected tracks height to a very high value, hence making the tracks wide on screen

Larger

Same as above, but a little less high

Large

Same as above, but again less high

Normal

Sets the height of the track to its default value which is a trade-off between readability and number of tracks displayed

Small

Reduces the size of the tracks to a low value, increasing the number of on screen tracks

Toggle Active

Toggles the active state of a track. An inactive track will be grayed and wont play any sound. That can be seen in the A colomn of the Tracks and Busses List

Remove

Deletes this track and its playlist (no file is harmed in the process, and the regions from the playlist stay in the Editor for later use)