Transform - set reference point button
I'm familiar with image > transform rotate, scale etc. So when setting a transform, I can change the reference point by Ctrt T and tehn dragging the centre to wherever I want it. So far so good.
If I want to set it numerically, I have to move the reference point and then type in centre X, centre Y and rotation angle. Up until that moment it assumes that those values are it's transform location. The only difference being is that the centre of the grid of 9 squares is left unfilled:

So without offsetting the reference point first (which seem counter-intuitive if you are putting in numeric values)
OR
toggling the reference point location every and then back on again (v annoying)
Is there a keyboard shortcut or button for this?
