Hi Keith,
Once I have a page laid out in the Print Queue, is there a way to duplicate it within the Queue?
You can of course add multiple copies of an image by changing the "Number of Copies to Add" (above the thumbs on the right) but if you have a specific layout the only way I know of doing that is by using a template. It may be possible to do it another way, may someone else will know.
A template is especially useful when the same layout is used repeatedly.
If you make a template of your layout using the template thumb and save it. Then recall using Custom Print Properties, Layout. Select the images you want to use on one page, click the red + to add them. By repeatedly pressing the + button a new page of the same images will be created.
Hope that helps.
Terry