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While dragging, snap a point onto existing points.

Menu: Edit > Snap to Points | In depth: Canvas basics

One of the four snap toggles, and the strongest of them. With it on, a point you are dragging jumps onto existing points as you come near, and a gold dot with a ring shows you which point it will land on before you let go.

It is on by default, and it applies while you drag. Placing a new point has its own rules, described on Point.

When several things are within reach of the cursor, the order is fixed, and points come first.

1. An existing point.
2. An intersection of two objects.
3. A guide crossing an object.
4. An alignment with other points.
5. A guide on its own.

So a point wins over a crossing even when the crossing is nearer, which is deliberate: an existing point is a thing somebody put there, and landing exactly on it is almost always what was meant.

Hidden points still catch. The construction under a figure is usually hidden, and snapping to it is how you keep building on it, so hiding something does not take it out of the snap set. If a drag keeps landing somewhere you cannot see, a hidden point is why.

A point cannot snap to its traveling companions. When a drag moves several points at once, all of them are left out of the snap set, so the group cannot collapse onto itself and a point cannot chase its own old position.

Guides snap to points too, with the same priority: drag a guide and it lands on a point or a crossing rather than wherever the cursor stopped.

For placing something deliberately close to a point without joining it. Points snap from a few pixels away, and at a tight zoom that is a real distance, so a deliberate near miss needs the toggle off rather than a steady hand.

Turn it back on afterward. Most of what makes a construction hold together is points landing exactly on other points, and this is the toggle that does it.

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