Setting up and rotating multiple symmetries

[theantisphere]

It would be nice to have the ability to set up your horizontal and vertical symmetry lines independent of each other. Also, being able to rotate a symmetry line would be a nice addition, as sometimes i'd like to have a symmetry on a diagonal. Also, if this was the case, a hot key that allowed you to jump between your various symmetries would be great; so, one minute i can be drawing with my vertical symmetry on, and the next, after hitting a hotkey, i can be drawing with a horizontal or diagonal symmetry on.