Item name
Use unique name if you will refer to this item in tween effect, bitmap fill or action script.
Opacity
Item can be semi-transparent in Flash player
Rotation, Flip
Item will be rotated or flipped in Flash player
Layer
By default items are placed on the bottom layer "Base Layer". To change the layer choose "Item" > "Placement Properties" and change the layer to place the object above other items. This is very useful when a master frame item must be placed on top (by default master objects are below frame objects). In the following example master object is placed on "Layer 1".
layer1.sfd
Flash Designer supports 7 layers (base layer + 6 layers).