Working with Layers
To create a new layer:
Always name your layers as you create them because as the number of layers in your movie grows, your ability to remember which layer that ball or particular piece of text is on diminishes.
There will be times you decide that you no longer need/want a certain layer...
Properties: Right click on a layer and choose Properties to bring up it's Properties dialog box
To rearrange layers simply click on one and drag it up or down in the Timeline. Remember that no matter what the name or number on a layer, it's place in the hierarchy is what determines whether it's objects are above or below objects on other layers. You will want to make sure that something you want in the background doesn't hide objects that should be on top of it, so be sure that a layer like that is near the bottom of the stacking order.
As drawings/movies become more complex, making selections becomes more
difficult and the screen redraw time slows down as it requires more
processing. You can lighten the load on your system by using the View Mode
of a layer. Access the Layer Properties dialog box and put a check in the
"View layer as outlines" box. You can assign each layer it's own color for
outlines by clicking on the color chip. This is similar to the
View/Outlines but only affects a layer at a time rather than the entire
movie. You can also change to layer view directly from the layer. Choose
the layer you want to affect and then click on the colored square below
the open square at the top of the Timeline.
For complex movies, layers can be arranged in folders for better organization.