Swap X and Y values with a keyboard modifier

It would be helpful to have a way to swap X and Y values of two-value properties such as Scale or a shape's Size.

RobBarrett_2-1767810031228.png

For example, if I have a landscape comp containing a rectangle of size 1920x1080, and I want to duplicate the comp to create a portrait version with matching shape layer, I need to unlink the dimensions of the shape's Size property, retype as 1080x1920, and then relink.

If it were possible to, say, hold Cmd and click (or double-click) one of the X/Y property values and have them swap over, it would be a big time saver.

(On three-value properties, like Scale on a 3D layer, I would still imagine that the most expected outcome would be to swap the X and Y values and leave the Z value as-is.)