For some applications (such as edging a plate), scoring the frame (vector engraving) rather than engraving it (raster engraving) can save a lot of time.
Using this method, the border line is created as a vector (hairline) in the graphic. When engraving, the vectors are traced, while raster engraving works line by line in X direction.
When engraving a project such as the featured image, for example, you could save up to 2/3 of your work time if you score the edge instead of raster engraving it.
—Josh Stephens, Trotec Laser