File menu
From the open and save button

The file menu opened from its toolbar button: New, Open…, Save, Save as…, Export SVG…, Export image…, and the two prints

The items

ItemKeysWhat it does
New—a new document in a new window (the browser does not pass ⌘ N to the page)
Open…⌘ Oopens a document in this window; with unsaved changes it asks for confirmation
Save⌘ Ssaves to the file you last saved to, or the .ja, .jaz or .json you opened; otherwise it asks where
Save as…⌘ ⇧ Ssaves to a new file; the format dialog opens if there is something to put in a package
Export SVG…—the SVG export dialog
Print low resolution…⌘ Pprints to scale with the working images
Print high resolution…—prints to scale with the photo originals at 300 dpi