> - [Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/222790) in GitLab 13.2.
> - It's deployed behind a feature flag, disabled by default.
> - It's enabled on GitLab.com.
> - To use it in GitLab self-managed instances, ask a GitLab administrator to [enable it](#enable-or-disable-file-by-file-diff-navigation-core-only).
For larger merge requests it might sometimes be useful to review single files at a time. To enable,
from your avatar on the top-right navbar, click **Settings**, and go to **Preferences** on the left
sidebar. Scroll down to the **Behavior** section and select **Show one file at a time on merge request's Changes tab**.
Click **Save changes** to apply.
From there, when reviewing merge requests' **Changes** tab, you will see only one file at a time. You can then click the buttons **Prev** and **Next** to view the other files changed.