Is there an add-in that will do this without writing code? I saw a reference to one in a search but it is no longer available.

Where did you see the reference - did it describe what the add-in did?

__________________
Andrew Lockton
Chrysalis Design, Melbourne Australia

Insert a multiple-selection list box in WORD|MS Answers

That was not an Add-In. It was a Combo Box, which does not provide for multiple selections. It can be done, I think, with a User Form, but that is coding your own dialog box, not plugging in an Add-In.


A combo box is a dropdown that lets you write in your own answer but it does not allow for more than one.
Create & Employ a Userform by Greg Maxey

If you looked at that thread you would have seen my response there:

I would say that thread's marked answer is very misleading. I agree with Charles, a single combo box (either in Content Control or vba userform guise) WILL NOT support multiple selections. And the term addin is generally reserved for a template that provides some kind of functionality, not an object you stick on the page of a Word document.

__________________
Andrew Lockton
Chrysalis Design, Melbourne Australia

OK so if there is no 3rd party add-in doing that is going to be way over my head. Instead, I saved my list as a building block quickpart with auto-text and the list will insert into the document when I type the name of quickkpart. Is there a way to attach my quickpart list to an option button instead of autotext? Or attach a regular single-choice dropdown to be able to insert a quickpart when selected. Thanks

A keyboard shortcut.
Assigning Keyboard Shortcuts in Microsoft Word 2007-2021 (365)

If you save it in one of the Custom Building Blocks Galleries, your could add that gallery to your QAT.
Build & Deploy Custom Building Block Galleries by Greg Maxey
You can find how such a gallery in the QAT works by looking at 2003 WordArt Add-In for 2010-2021 (365).

Look also, instead of the AutoTextList, using a Building Blocks Gallery Content Control.
Building Blocks Gallery Content Control and AutoTextList Field Comparison and Demonstration
When I use these to give a choice for one use, I set the BB Gallery CC to delete the CC when edited. That way, when a choice is made, the bb is inserted without the gallery content control remaining around it.

I recommend against adding a legacy ActiveX Button. These do not work in the Mac interface and will give a macro warning. If you need it, though, here is Using VBA to Insent an AutoText Entry or other Building Block.