MFC Deck Multicolumn

Awesome application but I am looking for documentation on the multicolumn format. I’m trying to do something similar to your Office Lights card.

Is there documentation on exactly how to build that dictionary? I have used a show result to show a change from the “sfsymbol:lightbulb” to something else in the first position of the first row, but it does not appear in the resultant dictionary, so I’m missing something.

Thanks for any assistance or for pointing me toward the information.