1
open the new track dialog box
Shift+Command+n
2
Toggle through the stereo and mono options of the new tracks dialoug
hold Command+left or right arrow
3
Cycle through track types
hold command + up or down
4
Add new row
Command+Shift+Down
5
Remove bottom row
Command+Shift+Up
6
Select multiple
Hold Command
7
Select All
option and click