You're welcome Carlos - also don't miss version #3 above which automatically rotates by 90 degrees skipping the rotation step entirely, hopefully you should be able to use that version for your 90% use case.

For the version #2 rotation the mouse will track along a plane from the midpoint of the median line so try moving your mouse around that midpoint area rather than near one of the ends of the edges and it should probably make more sense.

- Michael