Snapping Types

You can see the snapping of dimensions while dragging if the dimensions lies within the snapping zone. You can see automatic snapping if the dimension is inside the snapping zone.

Linear Dimensions	Snapping Behavior
Dimensions without adjacent dimensions	During dimension creation or dragging, while you place the dimension line, soft snapping occurs at 6mm intervals from the edge of geometry.
Dimensions with adjacent dimensions	When you create or drag a dimension line near an existing dimension, snapping occurs collinear to the existing dimension.
Dimensions or annotation text	The dimension value or text is automatically snapped to the center of the dimension line. However, if the text or value is moved farther from the center, it can be placed out of the dimension lines also.

You can snap annotation planes to the planes, edges, or centerlines of a cylindrical face that is parallel to the plane.

Geometry	Snapping Behavior
Planes parallel to annotation plane	While you activate the Annotation Plane command and select a plane, snapping occurs between the annotation plane and the plane.
Edges parallel to the annotation plane	While you activate the annotation plane command and select the edge, snapping occurs between the annotation plane and the edge.
A centreline of cylindrical faces parallel to the annotation plane	While you activate the annotation plane command and select the centreline of a cylindrical face, snapping occurs between the annotation plane and the centreline of the cylindrical face.