Can we allow a user defined field to be listed in the drop down of the card customization (top indicator List).

currently we use Octane 16.0.200 version.

Teams wanted to see four fields on the Card in the storyboard. I chose the card customization option and configured the footer section to include the 3 out of 4 fields that was requested.

I found that the top indicator field drop down had only three options to choose (rank, has attachments, and blocked). How can we add another user defined field to be made available for selection similar to the footer option.