Understand the interface
Bookmarks window
From that window, select the Local or Remote buttons to view the local repositories on your computer or the remote repository that you can clone.
Toolbar
When you open a repository with SourceTree, you see this toolbar. The toolbar provides various options that are normally done in the command line.
Sidebar
When you open a repository with SourceTree, you see this sidebar.
The sidebar provides options for the repository's current workspace, available branches, remote branches, and tags.
Repository history and code diffs
When you open a repository with SourceTree, you have access to project history and code diffs.
Viewing history
You can view the full history of your repository. You can also filter the view further based on branches.
Viewing diffs
When selecting multiples commits in this view, you'll be able to view the changes that have been made between those commits.