Select a start point. Select the exterior surface line of the
wall (A).
Select the first end point. Select the exterior corner point of
the bay window (B).
Move the cursor vertically and click the location of the
dimension (C).
Click the next end point. Select the exterior corner point of
the bay window (D). The program automatically adds the dimension
beside the previous one.
Click the next end points, or the lines (E), (F) and (G).
Select Confirm. You can add a new chain dimension.