What can I do to merge changes from branch onto master? Follow

I am trying to go through the basic steps of working in branch and incorporating changes to master.

What I have done is:

1. Initiate a Git repository.
2. Add two files.
3. Commit the addition.
4. Create a branch.
5. Change one of the files in branch.
6. Commit the change.
7. Go to master.

So far everything has worked, but I'm having trouble with what I believe is a next step of pulling the changes from branch. The PyCharm In-Depth VCS #3 video has us clicking a button at the top of the screen to pull from branch.

My screen presently looks like so:

What should I do to have the IDE's UI features enabled so that I can access version control as the process is documented in the videos?

Thanks,
C.J.S. Hayward