Flash Training Course - Aligning

Like in other vector programs, you can also align objects, groups and symbols in Flash. The alignment options are displayed in the Align window found in the Modify menu.
In addition to alignments, Flash also allows you to match the size of different objects.

To place an object right at the center of the stage, select it first and then click on the third icon from the left in both horizontal and vertical alignments and check the align to Page checkbox. (refer figure below).

Selected objects can also be space evenly on the horizontal or vertical axis. The other options are quite self explanatory.