Access, clearing field in every record

[Turnip12]

I'm trying to clear a field in all of my records, what's the best way to go about doing this? As of now, I just have a form that clears the field, but it only does it for the current record, so I have to go through every record on that form to do so.

[Creosote]

Make a new query.

UPDATE Table1 SET Field1 = NULL