Users can create a new document with '⌘+N' or 'New' from the application menu. 

The document will have some predefined settings, those can be changed in the Preferences.

Character set

In the Preferences default template character sets can be predefined. Each new UFO document will have those glyphs as template glyphs. 

Set curve description

In the preferences you are able to switch between bezier curves and TrueType splines.

Read more: Preferences