CTGreybeard,
I think a two step process would be the easiest.
There are already two intersections between the cyan and the magenta shape
Select the magenta rectangle with a left click.
Now pick your shape with clicking and holding near the left lower corner but avoid the corner marker itself.
The shape will stick to your cursor with the left lower corner and you can release the mouse button.
Place it at the intersection of the lower magenta horizontal and the cyan vertical.
The offset to the magenta shape is now zero.
Do this again but now it doesn't matter which corner you pick.
When the shape sticks to your cursor type in the Command Line '@10,0' or '@10;0' depending your list separator.
A coordinate starting with an '@' is relative to the last position.
Finalize the action with hitting ENTER.
The offset between the cyan and the magenta shape should now be 10 units exactly.
Regards,
CVH
