For help when drawing, you can use guide layers. You can display a square background grid in all scenes or you can create your own aids on any layer and designate that layer as a guide layer. Guide layers are indicated by a guide emblem that is displayed before the layer name. Guide layers do not appear in a published Flash Player movie.
For information on adding a motion guide, see Tweening motion along a path.
To designate a layer as a guide layer:
Right-click (Windows) or Control-click (Macintosh) and choose Guide from the context menu.
To change a guide layer back to a normal layer:
Select the layer and choose Guide from the context menu for that layer.
Note: Place all guide layers at the bottom of your layer order. This can prevent you from accidently dragging a normal layer onto the guide layer thereby turning it into a motion guide layer.