My walls have multiple layers which used to display in floor plan, but now they are gone, and only my main layer shows. How do I turn the display of those other wall layers back on so I can see them in my floor plan?
If you have checked the Disp column for the "Walls, Main Layer Only" layer in the Layer Display Options, only the main layer of your walls will display.
To turn on the display of all wall layers
Navigate to Tools> Layer Settings> Display Options from the menu.
In your currently active layer set, scroll down to the "Walls, Main Layer Only" layer, and uncheck theDispcolumn or remove the check from the Display checkbox.
ClickOK, and any walls in your plan that have multiple layers will now show them in floor plan view.