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 (in AWS CodeCommit this is called Squash and Merge) Linear history with only a single commit on the target Deleting the source branch when squashing is recommended git merge pr --squash
Rebase (in AWS CodeCommit this is called Fast Forward Merge) Linear history with all commits rebased onto the target git rebase master git merge pr --ff-only
Semi-linear merge (in AWS CodeCommit this is called 3-way Merge) Rebase source commits onto target and create a two-parent merge git rebase master git merge pr --no-ff

For more info: 

Azure: https://devblogs.microsoft.com/devops/pull-requests-with-rebase/

AWS: Merge a pull request in an AWS CodeCommit repository - AWS CodeCommit (amazon.com)