You can optionally show bar numbers in either a rectangular or circular enclosure in each layout independently; for example, if you want bar numbers to appear with rectangle enclosures in the full score layout, so the conductor can easily see them, but with no enclosures in part layouts, where pages tend to be less busy.
Bar numbers in enclosures automatically erase their backgrounds.
Procedure
Result
The enclosure type of all bar numbers in the selected layouts is changed. The size and shape of enclosures depends on their padding values and the bar number font size.
Tip
You can change the line thickness, size, and padding values for all bar number enclosures project-wide on the Bar Numbers page in Engraving Options.