Combining Objects into Blocks - AutoCAD 2011 and AutoCAD LT 2011: No Experience Required - page 339

FiGuRE 7.37 Change the block's X scale factor in the Properties palette.
Place the cursor over the intersection of the outside wall lines on
the upper-right side of the pop-out, as shown in Figure 7.38.
FiGuRE 7.38 Selecting the first point to define the insertion point
2. Start the INSERT command, verify that A-GLAZ appears in the Name
field, and click OK.
3. Move the cursor directly to the right and enter 7' ↵ ( 2134 ↵ ).
The window is inserted 7 ′ -0 ″ (2134 mm) to the right of the corner.