@User when starting a copy/move operation the point around which the group is rotated/flipped is the position of the mouse when pressing the 'm' of 'c' key. If you set the mouse in the center of the group before hitting 'm' or 'c' that will be the point around which rotations/flips will happen. If you select and just rotate ('R') or flip ('F') the center is again the mouse pointer. There is another possibility to rotate / flip each object around its center. this will mess up the circuit completely if done on a group of wired/connected objects. Just try to select a bunch of transistors and press Alt-F or Alt-R. this should be done only on component instances, and may be useful to rotate net labels. If you expect a different way to rotate/flip things please let me know! :-)

Ah sorry, I was using Alt-F on a group of wired parts. I didn't know about plain F. Sorry, PEBKAC again!