See if this works for your needs;
Go to Chords window
Highlight the bar you want a key change at
Click 'Bars' button (in the Chords window)
Use the Key Change drop down to select a new key

Click OK

I see it change in notation view when I get to the changed bar, but not sure if you have other needs.. you may need to use a combination of Key Change and Transpose depending on your intent.



Make your sound your own!
.. I do not work here, but the benefits are still awesome