How do I branch from another branch in SourceTree?

[RaChen]

After I clone the repository, I just see master branch. When I click branch it always branches from master. How do I branch from other branches? 

[RaChen]

Source tree lets me branch from a specific branch if i check out to it first. The current branch in Branch dialog could be a list of valid branches under the repository instead of a label of current branch.

[Mikael Sandberg]

Hi Raghu,

Welcome to the Atlassian Community.

When you clone a repository, you will automatically clone it with master as your default branch. You can choose a different branch by clicking Advanced when cloning in Sourcetree.

Git/Sourcetree will always by default create a new branch of from the current branch you are on. You also have the option to branch off of a specific commit.