In general, animations should contain multiple layers
|Double click on the name
|Change the order
|Click and drag - top layers are rendered last, on top of lower layers
|Toggle the dot below the Eyeball icon - Hiding all layers except one is an easy way to control which layer you are working on
|Toggle the dot below the Lock icon - a locked layer can not be accidentally modified
|Double click the folder in front of the name
|Show only outlines
|Click on the square box - The outline color can be changed via the properties dialog box.
The layer with the Pen icon is currently active - all actions will modify that layer. If the layer is selected and locked, then the pen icon will have a red line through it.