Snapping to Cells
A cell is a small drawing — usually of a frequently-used or complex symbol, notation, or detail. To snap to the origin of a cell, set the Snap Mode to Origin. When the Snap Mode is not set to origin, tentative points snap to component elements within the cell. For example, when the Snap Mode is Keypoint, tentative points will snap to a keypoint on the line, not the origin of the cell.