I'm learning using Git on an OS X Terminal. It seems really easy. But I can't handle just one problem: When I try to merge two branches, for example "myTestBranch" into "master" this program covers the terminal and shows me a new view where I should write the merge message. And then, I don't know how to do "Enter", save the merge message and then come back to the main terminal view where I can continue working.

Does anyone know, how does it work?

[![What I see, when i try to merge](https://i.stack.imgur.com/dedHv.png)](https://i.stack.imgur.com/dedHv.png)