Page History
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The Rebase operation allows integrating upstream changes into your local repository. It is the action of forward-porting local commits to the updated upstream head. Rebase literally rewrites the commit history and is used for maintaining a linear project history. The Rebase operation is performed using right click context menus on a mount within the Files Browser as explained here.
Branches
The Branches node displays all of the Branches. Right clicking on the Branches node offers the "Create Branch" context menu. Clicking on a Branch displays its Commit History in the History pane.
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