I'll work on it. Sorry.
Here is some field target position pics. The rules state that you can have a 6" pad to sit on. Nothing supporting the gun except for your own body.
I found that for me I sit at an angle with my left knee leading. I use my left arm across this knee and then place the gun on top of that. I balance it so I do not need much if any support from my shooting hand. I then move/wiggle my feet until the gun is lined up with the target, focus, aim and shoot. I tried the knee pads and found that it was just too wiggly for me so I went back to shooting across arm, over the knee. I also have a back brace with straps that go across your knees so when you sit down you can actually lean back into the brace. It's kind of a pain to wear but it does help me keep steady. I also have an old Army shooting jacket that seems to fit tighter these days????? It also helps you to lock your arms.
When I practice I use a bench and try to rest the gun so it is as near to my field target position and support as I can. So far I've not had a problem switching from bench to sitting field target position. But as time goes by I find that I have more trouble doing most anything????
Basically like this


Some shooters have adjustable stocks with a knee support so they are more upright.
Here is the Ladies World Champ


A typical lane holding 2 targets. We normally shoot the closest first. You can't see them here with the camera shot, but they are there.

This techinque is used when the targets are placed up in a tree

There are also mandatory off-hand shots

The shooters are paired up in two's or three's depending on the number of entrants and are assigned a lane to start from. A timer is used with a predermined time limit before the match how much time for each shot. Your paired partner keeps your score as you do his/hers.