Composite documents are created from parts clipped from one or more files which may then be output in a choice of layouts.

Set up the layout of the new document in the Composite document wizard
Set up the files from which clippings are extracted in the File pages table
Booklet layout
Multi-column layout
Close packed layout
Music part extraction layout
Select clippings in the Page editor window of the Trimming dialog
Enter the details of the clippings in the Trimming dialog; see Trimming options
Page numbers and additional text may be added to clippings: see Setting up text
How to re-open the wizard for editing: see Editing a composite document file