To merge tiles with windows:

 

1.Draw a wall.

 

 

2.Select the first segment closest to the first click.

 

 

3.Change the segment to a wall style with a window.

 

4.Create an elevation or open the 3D window.

 

 

5.Select any two tiles.

 

 

6.Right-click and select Merge Tiles.

 

7.Merge the window tile with the previous merged tiles.

 

 

a.If you switched the wall style on the correct segment, your merged tile will have a window.

 

 

NOTE: The window will not automatically center itself.

 

To center the window:

 

1.Select the window.

 

 

2.Right-click and select Properties.

 

3.Change the Vertical and Horizontal position to Centered.