Fix the Edges of Wall Volumes with the Coincidence Constraint

In the example, the edge of the wall volume is fixed to the edge of the window.

1. Activate the work plane.
2. Select Constraints > Coincidence.
3. Select the wall volume (A) and the edge line (B). Then, select the window (C) and the window's edge line (D).

   

4. Quit by pressing the Esc key.

Activating a New Work Plane
Activating an Existing Work Plane
Adding the Coincident Constraint in a Model
Adding Constraints between Wall Volumes