This post is only an idea for something I think could be very usefull.
Do you think could be feasible to have a sort of keyboard shortcut that automatically starts the A B line setting? When I drive a tractor I would prefer to press only 2 buttons for setting A B line, without touching the screen at all.
Once the shortcut is created I think anybody can set those buttons to an external keypad so easier to draw lines
What do you think?