Increase label outline thickness in freeview

I’m trying to increase the thickness of the surface label outlines on freeview and I’m having trouble finding the best way to accomplish this. I’ve found that if I go to More options > Dilate/Erode/Open/Close and I set Dilate to 2 or 3 and then click dilate, the boundaries of the outline will be artificially inflated and will create the appearance of a thicker outline. Is there a way to set this as a flag in command line if I’m trying to load many labels or automate screenshot generation? Or does anyone have advice for an alternative way to automate this process?