- Create an ossia by making a selection, and choosing Edit > Staff > Create Ossia Above/Below, or right-click to show the context menu.
- Input the music for the ossia in the usual way.
- Drag the signposts to change the start and endpoints of the ossia.
- Choose whether to show barlines, as well as many other options, in Engraving Options.
- There are also more options for in Layout Options, including specifying in which layouts they are shown.