Hello engrave question

No. There’s nothing like that in LightBurn.
Some alternative strategies:

1. set power to 0% on all layers and run the job. This has the disadvantage where you’re having to change your settings which may be impractical in some scenarios. Note that you can undo setting changes so may be manageable if not still error prone.
2. some lasers allows you to disable power to the laser and still run the job. Disabling power and running would get you the effect that you want but obviously not an option on all lasers.
3. I haven’t tried it but I think theoretically you could set S Value Max to 0 or something very small and power would be scaled to nothing or nearly nothing.