A. Branches on the side of the trunk can be cut downwards with the chain pulling. Let the body of the saw rest against the trunk and rotate the bar in a lever motion towards the branch.
B. You can cut branches that stand up vertically from the top of the trunk with the saw lying on its side, either with the chain pulling or pushing. Use your thumb to control the throttle.
C. If thicker branches are pressing against the ground you may need to cut them from below with the chain pushing, to prevent the bar and chain from being pinched. First make a shallow cut in the top to prevent the branch from splitting. Watch out in case it springs up when you cut through.
D. With really thick or uneven branches it is easier to cut them bit by bit into manageable lengths. First make a cut in the underside before you cut off a length from above. There is a considerable risk of kickback during limbing.