intro
Transpose / Change Key:
Choose the Key Signature tool .
Double-click the measure at which you want the key to change.
There is another way, too.
Convert from Sibelius.
See makemusic site. There is no direct conversion, except through musicxml (which I hear is spotty).
If I need a Sibelius sheet, I can use free Scorch, then do a Corel screen capture, bring into Corel and do a bit of bitmap manipulation.
Similar problem in printing from or making PDFs from Sibelius (fonts not embedded it seems on Hymnary) -- bring in PDF and resave in expressPDF before importing into Corel.