I've rotated the mesh to a position that no longer matches the global axis orientation but still want to transform my selection at right angles.
I have transformation selection set to 'normal', the z-axis becomes horizontal (which is ok I guess, as long as I can move in that direction.) but when I press 'z' to constrain my movement along that axis it locks it to the traditional z-axis vertical movement.
I can manually transform respective to the 'normal' transformation mode by grabbing the arrows but I want to input specific transformation values which is impossible with manual dragging.