I would like to view and perhaps change the merge settings in GitLab (see the screenshot). How do I do this via the API?
If this is when creating a project there is a string named "merge_method" & "remove_source_branch_after_merge"
merge_method
remove_source_branch_after_merge
So this would be
GET /projects id/merge_method
for existing projects you can use
https://docs.gitlab.com/ce/api/projects.html#project-merge-method