Suggestion. Press F5 (Goto) then select Special bottom left button, then bottom right select Data Validation then click OK. From there use the Data Validation and you should be able to reset your message and rules.
I've filled both title and text. It was viewable before I replaced the location of the message box. I don't know where I placed it. I have a lot of validated cells. Isn't it possible to recall the old location - maybe with VBA?
My sheet contains very different validation rules. I've no problems finding out which cells to which I've added validation rules, but I've just placed the message box somewhere in the sheet and I can't find it