Document Locking In TextEdit
Earlier today I learned that TextEdIt.app can lock (or prevent the editing of) any document that you open in it. The option is in the Format->Prevent/ Allow Editing. There aren’t many situations where this is needed or helpful, the only one I can think of is when developers are making “Read Me.rtf” files for apps they make. I suppose there may be other times when it’s useful, but I can’t think of those right now.