MACROMEDIA STUDIO 8-EXPLORING STUDIO 8 Manual page 233

5. Select the color black (#000000) from the Fill Color Picker.
Selecting black from the Fill Color Picker
6. Draw a rectangle on the Stage that is approximately the same shape as
the Stage.
Drawing a black rectangle the shape of the Stage
7. In the Tools panel, select the Selection tool.
8. On the Stage, click the rectangle you just drew to select it.
9. Select Window > Align to open the Align panel.
Create the border 233