Changing the size of ossia staves

By default, ossia staves are scaled to two thirds the size of a regular staff. You can change the scale factor of all ossia staves project-wide.

Procedure

1. Press Ctrl/Cmd-Shift-E to open Engraving Options.
2. In the category list, click Staves.
3. In the Ossias section, change the value for Ossia scale factor.
4. Click Apply, then Close.

Result

The scale factor of ossia staves relative to the prevailing staff size is changed in all layouts project-wide.