Building component keypoints are designed to work with associative dimensioning as a means of identifying additional points where associative dimensions can be placed. These keypoints are in addition to default element keypoints which are identified by tentative snap points.

Building keypoints make it possible for associative dimensions to be placed on components at many locations in addition to those made available by the default element keypoints. When forms and components are modified, associative dimensions used by Building keypoints also change.

These definitions further clarify this feature:

• Default element keypoints – These are used to locate specific points on an element when a tentative snap is used. End points and vertices are typical keypoints. Setting the Keypoint Snap Divisor also helps to establish keypoints between end points and vertices.
• Building Component Keypoints – These keypoints are located using AccuSnap. They serve as lock points for Associative Dimensions.