Layout Scaling - lighting plan layout dimensions over my imported sketchup model

I’m overlaying a lighting plan using my own symbols, on top of my imported Sketchup plan. The model dimensions are all correct, however I can’t scale the dimensions between my lights when drawing over it in Layout! HELP!

You need to change your dimension scale from “Auto Scale” to 3/8"=1’-0" because you’re dimensioning from symbols or objects in Layout.