Merge options provided by Visual Studio DevOps

I really like how Visual Studio (devOps) shows a visual hint for each type of merge that can be done via its interface. Here they are:

Merge (no fast forward) Nonlinear history preserving all commits git merge pr where “pr” is the name of the branch.
Squash Commit Linear history with only a single commit on the target Deleting the source branch when squashing is recommended git merge pr --squash
Rebase Linear history with all commits rebased onto the target git rebase master git merge pr --ff-only
Semi-linear merge Rebase source commits onto target and create a two-parent merge git rebase master git merge pr --no-ff

For more info: https://devblogs.microsoft.com/devops/pull-requests-with-rebase/