I use them for opening the bomb bay door,and dive flaps. I use the slider to the right of the throttle for manual trim and it is an analog like elevator or rudder.
I use the target software. Very powerful. What I suggest is set up in AH first then as time permits work on the Target version. If you don't start Target it uses the AH settings.
I use a modified scaling but the setting are so personalized, you are best served by experimenting.
Some of the other switches, tail hook, programmed setting for 200mph climb, auto climb, level.
Remember to set your GV-Boat. I also use a mode for bombers so my hat switch moves the gun positions and I have buttons to do a bomber auto calibrate for 3 seconds and 10 seconds duration.