Set Object Position
Flash CS4 Tutorial
How to Set Object Position in Flash
In addition to the Selection tool, you can also position objects on the stage with the Align panel and the Properties panel.
Add a rectangular object to the workspace with the Rectangle tool (r key).
With the rectangle selected, alter its location by changing the x and y values in the Properties panel (Cmd/F3 (PC-Ctrl/F3)). The x=0 and y=0 point is the upper left corner of the stage.
Open the Align panel by choosing Window > Align ((Cmd/k (PC-Ctrl/k)).
The To Stage icon should be medium-gray.
Click the various icons to align your object to the stage center or one of the edges.
Whenever you specify the object location in the Properties panel, the location is set based on the object's registration point. By default the registration point is in the upper left corner of the object.
If you have a Symbol or Drawing Object, double-click the object and move the object to reposition the registration point.