Edit repeat marks

how can I edit repeat marks and save them to use in different projects.
thank you

Is this a continuation of your earlier thread?

What aspect of repeat mark(er)s are you wanting to edit, things like coda/segno symbols or the font styles used in e.g. “D.C. al Coda” ?

If it’s related to paragraph styles, you can click the Star button in the bottom left of the Paragraph Styles dialog which saves your changes as the default to your user library.

I want to edit the segno sign

You can change various aspects of repeat marker signs in Library > Engraving Options > Repeat Markers, including their scale size relative to repeat marker text.