Aligning controls
Select the controls you wish to align by clicking on them whilst holding down the
key.
Controls are aligned to the last item that is selected, known as the dominant control. The dominant control is displayed with blue handles.
Example
This shows a group of selected controls. The bottom control is shown as the dominant control because it was the last to be selected.
Use the buttons on the toolbar to align controls to the left, right, top, or bottom.
Note: Controls cannot be aligned with others outside the container in
which they reside.