File menu

New
New From Template
Open...
Open Recent
Open Clippings
When you first install OmniOutliner Professional, this is a single menu item Open Default Clippings which, believe it or not, opens your default clippings file. If you set up more clippings files in the Clippings preferences, this becomes a submenu from which you can select any clippings file.
Close
Save
This command saves the current version of the file to the disk. If this is a new document that has not been saved before, you will have a chance to specify the name and location of the saved file.
Save As...
If you want to save your work in a new file, use this command. You will be able to specify the name and location of the saved file.
Save As Template...
If you would like to turn your current document into a template, use this command. Once you do, this document will appear on the New from Template sub-menu.
Save All
This command will save all open documents to their current name and location. If any of them have not yet been named, you will get a chance to specify the name and location for the saved file.
Revert to Saved
Export...
Page Setup...
This command opens the Page Setup sheet, with which you can specify how you want your document to print.
Print...