Snapping to an object

End point

Finds the endpoint of arcs, and the end of an object's edge

Mid point of edge

Finds the middle of the edge of an object

Center point

Locates the center of 2D objects and arc edges, as well as meshes, extrudes, sweeps, spheres, 3D polygons, 3D planar faces, and walls, floors, roofs, roof faces, loci, and columns

Quadrant points

Finds the top, left, right, and bottom of circles, ovals, rectangles, and rounded rectangles

Insertion point

Locates the object origin of loci, lights, objects, symbols, text, and for dimensions, one of the referenced points

Vertex

Locates the corner point on polyline, polyline Bézier, and polyline cubic segments; for 3D, finds the vertex of a solid or the control point of a NURBS curve

Nearest point on edge

For 2D, finds the closest point on an object's edge, and for 3D, finds any non-specific point along a solid edge or NURBS curve. It may be more convenient to use smart edge snapping instead; see Snapping to a smart edge.

Master snap points

Enables priority snapping for objects, which is useful in congested areas of the drawing, or for certain operations like dimensioning or moving objects, when there are many object snap points within the snap box. The SmartCursor snaps to the master snap point defined for the object, above all other object snap points. See Concept: Snapping indicators for more details. Master snap points display with a filled red square by default, but this can be changed; see Interactive appearance settings.