git gui equivalent to git checkout -b

What is the git gui equivalent to "git checkout -b"?

I have a working tree with changes that I don't want to commit to "master" 
yet.  So I want to create a new branch to contain my changes.

If I go to "Branch->Checkout", I don't see an option to create a new branch.

If I go to "Branch->Create", I see an option to "Checkout After Creation", 
but I want to be sure that is the right choice.