Hey man i want to share some of my knowledge about flash.
Alignment
Before you start,make sure you've already press Ctrl+Alt+8(To Stage).
Horizontal Alignment
Ctrl+Shift+1
Align things at the left side of the dimension.
Ctrl+Shift+2
Align things at the middle side of the dimension.
Ctrl+Shift+3
Align Things at the right side of the dimension.
Vertical Alignment
Ctrl+Shift+4
Align Things to the upper side of the dimension.
Ctrl+Shift+5
Align Things to the middle side of the dimension.
Ctrl+Shift+6
Align Things to the lower side of the dimension.