Now, any arm coordinates we didn't select previously, are now have selected. This way we don't end up with any rogue coordinates that are miss placed.
Note: We're only working with the lower arm at this time, because the upper arm is best left to blend in with the front/back of the body. A seam right in the shoulder joint would be very noticeable, we're better off with the seam at the elbow joint, where it is far less noticeable.
Repeat the mirroring procedure with the bottom arm coordinates but this time place them so you can paint a map that will wrap around. We'll adjust the squashed coordinates later, once everything else is in place.
