Workshop:
open activity3_example.fla and activity3.fla
Aligning buttons to the stage is simple when you use the "Align" panel.
Open the "Align" panel ("Windows" > "Align") then select "Align Left Edge" and "Distribute Vertical Center". Make sure that "To Stage" is turned "off".
Getting Started: Adding Sound to Buttons (activity 4)
Workshop: open activity4_example.fla, activity4_sound.fla and activity4.fla
When adding sounds to your buttons, add another layer, then add a frame either on the "Over" or the "Down" state.
With the frame highlighted where you want your sound to occur, drag the sound onto the stage.
Be sure that you select "Event" in the "Properties Window".