Using calipers for an exact fit

The outline from your photo is close, and your calipers tell you exactly how close.

Turn on the calipers with K or M, or from the menu. Hover over the outline and the calipers clamp across whatever is under your pointer. Click to pin a reading, or Option-click to measure between two points. Pinned readings stay until you clear them, one at a time or all at once.

Gridbox Pro tracing the wire cutters with Calipers on: span A across the handles reads 83.28 mm in the Caliper check card

Fixing the outline from your readings

Measure the real tool at the same spot and type the number into the caliper card. Gridbox Pro shows the gap to a hundredth of a millimeter and tells you in plain words which way it was off, where "small" means the outline is smaller than the tool at that spot. With two or more readings that agree, Fix the scale rescales the outline to match. If the width and height are off by different amounts, which can happen when a photo is taken at an angle, it corrects each direction separately. Your readings also give Gridbox Pro a suggestion for how much extra room to give the cutout.

Hundredths of a millimeter

Column width and Row depth show and accept hundredths of a millimeter, so if your calipers say 20.47, you enter 20.47.