Layers
Layers make it easier to work with very complex drawings.  They allow you to separate elements of your work and change things you want to change without affecting other parts of your drawing. 

If the layers window is not in view, select Window → Show Layers from the menu bar.  All PageMaker documents contain a single layer to begin with.  You have the ability to add more layers to your document by clicking on the arrow in the upper right hand corner of the layers window and clicking New Layer…  Each new layer you create will outline your objects in a different color.  Select the color you wish to use and click OK.  To add an object to a layer, click on the name of the layer you wish to modify and draw. 

You may hide layers that you're not working with by clicking on the eye to the left of the layer.  The images in that layer will disappear.  To bring them back, click on the place where the eye should be. 

You may also lock layers so that they cannot be edited.  To do this, click on the empty box to the left of the layer you wish to lock.  A pencil with a line through it will appear indicating that the layer is now locked.  You will now be unable to make any changes to this layer.