I have about 20 choices I'd like a user to select from and have the text output to a single cell.

Sounds simple, right? Just create a Data Validation List? Yeah, but that only allows you to select ONE of the items in the list -- I want to select as few as zero and as many as all 20, combining the resulting text into a single string - space or comma delimited.

My first thought was checkboxes, but all I can seem to figure out is how to get ONE of the results into the cell, meaning I'm better off with the Data Validation List because it's easier.

Especially since I need to repeat this for as many as 200 or 300 lines, I'm wide open for any ideas.