Changing base units without changing object dimensions

I generally use metric units for my graffle work. Every now and then I need to convert a canvas [say with furniture project parts] into inches.

I’m confused how to do that and keep a 70mm by 500 mm table leg object as 2 3/4" by 19 5/8".

Couldn’t you draw in metric units and then change the canvas units to inches?

…or I think you can keep the canvas units as is and specify the units in the Geomotry Inspector and it will convert them for you.