Change project Key and chords?

Is there a way to quickly change the entire chord progression of a composition to a different Key?

In other words, If I create a project with backing parts for an existing vocal melody, and then want to try the entire project in a different key, is there a simple way to change the key (and chords) to the new key, or do I have to manually re-enter all the new key chords?

I understand that chord inversions and so forth may be changed. That's not an issue.