I may have messed something up, but I'm having troubles changing the key signature midsong, and having the new key signature show up on the subsequent bars. Here's what I did: with the bar I wanted to start the new key highlighted, I clicked F5, and used "key signature change to" (in my case the original key is A, and I wanted to change to C. I did this, but didn't see a change in the display on the leadsheet.

What is the correct way to do this?

Thanks,

Bob