Checkboxes and date fields + "Update all existing records with this value"

I saw Jerry's comment in the post below and in version 3.54 can't find the check box referenced. Could someone please give me a few more clues where to find it or a screenshot? I've tried various scenarios of records with checkboxes and checkbox lists and don't see that option in my Field Editor.

From post: https://www.interactivetools.com/forum/forum-posts.php?postNum=2245549#post2245549

"Also, in V3.54 and maybe some other earlier versions, there's a check box available when you add either a check box or date field to an editor that says, "Update all existing records with this value" which should set the dates or checkbox value to all existing records."

I see it was a new feature in the 3.52 changelog - a very useful addition!

~ Deborah