Final answer:
An amend commit in GitHub Desktop allows you to make changes to the most recent commit without creating a new one.
Step-by-step explanation:
In GitHub Desktop, an amend commit is a way to make changes to the most recent commit without creating a new commit. It allows you to fix any mistakes or add new changes to the commit message or the files in the commit.
To amend a commit in GitHub Desktop, you can simply make the necessary changes to the files or the commit message, and then click on the Commit to master button. This will update the existing commit with your changes instead of creating a new one.