What is the difference between “Rollback…” and “Back Out Submitted Changelist #####” in Perforce P4V

Question

I want to reverse the changes from one of my checkins. In the right-click context menu of the particular changelist, there are these two options:

• Rollback...

Answer 1

Reverse a changelist submission

You cannot undo a successful changelist submission, but you can reverse previously submitted changes in two ways:

Rollback restores a file or set of files back to a specified changelist, date or revision. Any changes made after that point in time are not retained. Back out removes specific changes made at a given changelist, date or revision but allows a user to keep changes made in subsequent revisions.

For details please refer to https://www.perforce.com/perforce/r13.1/manuals/p4v/Working_with_changelists.html