Chosen Solution

I have a bernina 730 record I rescued, it had been sitting inactive long enough to get cobwebs, all that aside I love this machine. I have taken off the side panel, the motor cover and base to clean and see what was moving and what wasn’t. A good clean /oil and I was able to unseize the feed dog knob and get zig zag and the other stitches going again but have no idea where to start /look for the reverse function fix? Any ideas would be greatly appreciated, thanks in advance.

Why not check out the instruction manual to see if this tells you about reverse sewing: BERNINA-730-731-732-manual.pdf