Snap

Snap is an extension for the Ruler to increase its accuracy. When the cursor moves within snap radius to a vertex or a division point, the Ruler will be forced to go through that point instead of the cursor's real position.

The snap radius can be changed in View > Options.

The exact behavior of the snapping can be fine tuned using the Snap fineness toolbar:

• 1 – Snap the Ruler to vertices. When this switch is turned off, all the others will be too.
• 2 – Snap the Ruler to the edges' midpoints.
• 3 – Snap the Ruler to the edges' trisection points.
• 4 – Snap the Ruler to the edges' quadrisection points.