There is no way to edit your job post from public to private once the job has already been closed. However, setting closed jobs from public to private can be requested and will be actioned on as needed.
It is not possible. Hiding or removing past jobs would essentially give freelancers the ability to remove bad feedback, and that defeats the purpose of having feedback.
EDIT: I stand corrected. I didn't think it was possible.
This depends how the project has been posted, please refer to Avery comment above for more details.
If you have any additional questions fell free to post them here.
@Monique C wrote:
Craig A, can you tell me how to hide a project. I assume that you're recant at the end means there's a way.
Are you asking as a client or as a freelancer?