Thanks for your question.
To crop silkscreen objects be the border, please make sure to first define a border layer.
Note: The border must be a closed-continuous line.
The easiest way to create a border layer is to import your data (Gerber, Drill, ODB++, etc.), and then use the command "Generate Border Layer":
(A) Go to menu: Fabrication / Detect Border (Automatic)...
(B) Select an object on your PCB border.
FAB 3000 will automatically create a closed closed-continuous line, and place it on the border layer.
Now when your run "Silkscreen Optimizer" it will crop any silkscreen objects within the border.
joshua.snyder
Is this feature available? If so, could you point me in the right direction as I can't seem to find how to do it?
Thanks a lot!