Here you can find various features that either do not represent pure milling or engraving objects, or which can only be represented with additional instructions for production.
Studs & standoffs
Place studs (male) or standoffs (female) as mounting aids
Holes in the panel edges
Special FPD files for making holes in one or more of the end faces of a front panel
Specifications for a graphic file which is applied to the front panel using UV printing technology