Building, component and outline blocks can be stretched (scaled) when at the building level. To stretch a block, go to building level then select it and click on the Stretch toolbar icon, or select 'Stretch' from the right-click menu. When you activate the Stretch tool, a wire frame is displayed around the extent of the block and as you move the cursor across the faces of this frame, each face will highlight in the colour of the axis to which the face is normal:
If you then click on one of these highlighted faces, you can then stretch the block along the axis normal to the face. If the increment snap is switched on, the block can be stretched in increments:
In the case of the Z-axis, the stretch operation will only operate along the positive Z-axis:
Tip: By default the stretch will take place in the direction defined by the face that you select. However to stretch in both directions equally, hold the <Shift> key down while dragging.
Tip: You can also key in the new dimension using the keyboard. Note the difference to the Drag face tool where the increment in the extrusion is keyed in.
Note: You can only stretch one block at a time.
See also the Stretch, drag face and rotate tools tutorial.