Treatment of abbreviations and superscript items in full capital case
I am working on a documentary film and have hit upon a conundrum that we hope one of the fabulous Pain in the English grammarians can solve. We are using the full capital case (”all caps”) to identify our experts, in a text box that pops up below them during their appearances on screen; for example: JOHN SMITH, HISTORIAN. One of our experts has a name that includes a superscript letter (e.g.: JANE MCDONALD) and another has the abbreviation Jr. after his name (e.g.: WILLIAM DOE, JR.).
Question: Should those superscripted and abbreviated letters stay in all caps, too? Or should they be treated differently, either lower case or small caps? (e.g.: JANE McDONALD / WILLIAM DOE, Jr.) I’ve searched the Chicago Manual of Style and the Government Printing Office’s online manual, and have found no guidance in either.
Thank you for your help!