hiding cautionary key signature?

[David_Tee]

@Claude Lapalme

If you insert a Coda from the “Repeats” menu, hide the Coda text and enter a system break (you may have to fool around with the marker index on the Properties Panel if you are using repeat markers elsewhere, but that’s easy), you will find that changing the key signature where the “Coda” begins does not add a cautionary key signature.

Just come across exactly this same scenario (Coda / Start of System / Key Change). While I would dearly love the option to be able to hide Key Signatures, on this occasion I would like to be able to see them. Unless I’m missing something (always a possibility) I can’t see any setting in Engraving Options that’s hiding them.