Cropping tool: pure vertical or horizontal shift

Reason: to ensure pure vertical and horizontal shifts, without any diagonal component

User interface : holding shift key makes shift one-axis only

I would like to have this ability to move the crop window along one axis - though it might have to be implemented differently (which I don’t mind). Holding Shift while cropping already has a purpose. From the user guide: “If you have selected Unconstrained in the Aspect Ratio drop-down menu, holding down the Shift key will allow you to preserve the proportions.”

Manual<Unconstrained allows dragging an edge in one direction. However, you have to keep an eye on the other dimension to ensure it remains the same.

Good idea!