GitLab - Merge Requests, Merge request can be used to interchange the code between ... new merging request, there should be a created branch in the GitLab.
Merge request workflows · You checkout a new branch and submit a new page through a merge request. · You gather feedback from your reviewers. · You preview your ...
On the top bar, select Menu > Projects and find your project.
On the left menu, select Repository > Branches.
Type a branch name and select New branch.
Above the file list, on the right side, select Create merge request.