I want to remove the "Image" file in the Show Display Setup dialog box.

[tkelley3]

I accidently clicked on the Image while in the Tools-Show Display Setup dialog box. Once you click your mouse in there you cannot get out of the dialog box without adding a file. Then the radio button goes to Image and a little white square with a red X shows up on the display screen. (This is in the intermission part of the Show Display Setup screen. Now it (the file) cannot be removed. You cannot back space it or delete it but you can change it. Problem is you cannot make it a blank (like it was before I “stupidly” clicked in there). How can I get it back to blank or null?