Green button

Hello. I have been able to get the green button that offers an expansion of a certain column. If you see in the link provided (https://maymay.net/blog/projects/inline-google-spreadsheet-viewer/comment-page-2/), when the user presses the green button, the dropdown for the amount of games appears. I am trying to add that functionality to my table. I believe that it has to do with the “select” query code line but the examples have selected orders that do not make sense to me. Any help would be greatly appreciated!

The page I need help with: [log in to see the link]