Movement in rotated UCS, 2D.

Hello forum,

I have a width. I want to move an object along the x-axis, with this width. No problem. But when the UCS is rotated, it still moves the object along the original x-axis.

How do I move the object along the x-axis of the rotated UCS?

Movement along the z-axis will always be 0 (2D only).

Thank you.