In layout options > Staves and systems > Staff Labels
Shouldn’t it say “Minimum indent for systems without staff labels” insted of “Minimum indent for system with staff labels”?
No. The intention of that value is to ensure that you will always have an indent of at least that value. If you have different instruments hidden or shown on different systems, particularly if you have more than one system per page, then the systems may end up indented by a different value if e.g. a staff with the longest name is hidden on one of the systems. Setting this value to something appropriate allows you to counteract that.
Thanks a lot for this explanation Daniel.