One of the musicians in our church ask me to change the music score. He would like to set the notes half a note upwards (so C has to be #C and #G has to be A). How do I do that for whole the music score?
For each staff, Tools Transpose and enter +1 for the number of semitones. I would also recommend setting "Favor sharps" based on your description.
Small Addendum:
If the play back is to sound as transposed,
remember to UNcheck "Update staff play back transposition"
When you've done that for the first staff, NWC remembers your setting
and provides it as default for transposition of each following staff.