So it appears, at least at this incarnation of the user interface, that many advanced settings are not user-controllable, as @Tex99 mentioned earlier:
Now this has me wondering about how these advanced settings are managed in manual mode.
A good experiment to try in this respect is to use a piece of proofgrade material, and first do some cuts and engraves on one portion of it, using the proofgrade settings.
Then hide the barcode and pretend the material is non-proofgrade. Dial in the settings for speed and power manually to match the proofgrade settings that were used previously. Then re-do the same cuts and engraves on a different region of the material.
Then compare cuts and engraves in the two portions. Are they different? Does the Forge use different defaults for the advanced settings when used in manual mode?