Transposing key signatures alongside selections
You can transpose key signatures at the same time as transposing notes, which transposes both key signatures and notes by the same degree.
Procedure
Result
All notes and key signatures within the selection are transposed by the degree you set in the dialog.
Note
If a key signature included in the transposed selection applies to all staves, then it is transposed on all staves in the layout, even if your selection did not include all staves.
Individual key signatures, that is, key signatures added only to single staves using the Alt key, are transposed if included in a selection, but this does not affect any other staff in the layout.