You can resize an exterior wall layout by moving a wall, or by editing its dynamic dimensions. All adjoining walls automatically stretch along with the wall you are moving or editing.
To resize a wall layout by moving a wall:
Select the exterior wall you want to move. All attached walls will stretch along with it when you move it.
Hover your pointer over the center
grab handle to display the Move cursor.
Click and drag the wall to resize the wall layout, then release your mouse button.
To resize a wall layout by editing its dimensions:
Select one of the exterior walls. If you want to stretch the layout left or right, select a vertical wall. If you want to stretch the layout up or down, select a horizontal wall. Dimensions are displayed on the wall layout.
Click the dimension you want to edit. The Edit Dimension dialog appears.
Enter the new value in the Enter Distance edit box, then press Enter or click OK. The walls update automatically.