Wall Dimensions... I'm sure I've done this before o_0

[RMorrison]

I see you are on X1. Secondary dimensions are a feature that apparently was not available four versions ago. There was a metric template and an imperial template, and you had a choice when you started a plan, but were locked in once you started. You might try exporting a DWG file, then starting an imperial plan, and importing the DWG file -- appropriately scaled. I THINK convert lines to walls was available back then. You would then have two plans, but maybe that's helpful. In the future, please add a signature line that includes your Chief version.