You can tweak the parameter to compensate for the bidirectional scanning offset, which is caused by mechanical backlash and high-speed overshoot.
This feature works for the Line-filled engraving mode and is designed to impress you especially in cases where there is a large mechanical backlash or when the design to be engraved is intricate with rich details.
Under Toolpath Settings > Optimization > Scan Offset, input a percentage.