To Place Items on Snap Lines
You can add dimensions and detailing items to snap lines. Any items that are snapped to the line will move with the line.
1. Select the dimension or detailing item you wish to place on a snap line. The item is highlighted.
2. When you drag a dimension over the snap line, a dotted line appears and the dimension snaps to the line. Then dimension attaches to the line when you release the pointer.