You can renumber instruments so that their numbering matches their default player order; for example, if you want to swap the numbering of Horns 2 and 3.
Prerequisite
Your default player order matches the instrument numbering you want.
Procedure
In Setup mode, choose .
Result
Instruments are renumbered according to the order of players in the Players panel.
For players you have not already renamed, player names are updated to reflect the new instrument numbers.