Ability to Rotate Plots

It would be extremely helpful if we could rotate an entire plot through 90deg increments.
Or at least be able to rotate selected fixtures, shapes, pixel-maps, around 0,0 in 90deg increments.

In film/tv work the location of the console is fluid, and bears no relationship to which way up the lighting plot was drawn.
Currently, in a time-poor work-day, we have to re-draw the entire plot to achieve this.
We can rotate a single centralised shape (containing the floor-plan-jpg) around the objects centre, but cannot rotate several fixtures or hang structures around 0,0 or any other single point