Choose one of the selected figures to be
the model figure, the figure with which the other selected figures
are aligned. By default the last figure selected is the model figure. To
force a different selected figure to become the model figure, hold
down the SHIFT key and click on a different figure.
Choose one of the alignment methods from
the Align submenu under the Figures menu.
Align left sides
Align centers
Align right sides
Align top sides
Align middles
Align bottom sides