How do I delete a file in Mate?

["John J. Boyer" <john.boyer@abilitiessoft.org>]

Hello,

I can select a file in caja, but when I press the delete key nothing happens. What works?

Thanks,
John

-- 
John J. Boyer
Email: john.boyer@abilitiessoft.org
website: http://www.abilitiessoft.org
Status: Company dissolved but website and email addresses  live.
Location: Madison, Wisconsin, USA
Mission: developing assistive technology software and providing STEM services 
        that are available at no cost