Is it possible to customize the Extra kanban cards template?

Answer

It is possible to customize the Extra kanban cards template to make it different from the kanban cards template.

The procedure you need to follow is the following:

Click on Settings > Company settings.
Set Enable specific extra layout for extra kanban cards on Yes.
Once you activate it, in Print > Templates list choose the template whose layout you want to modify for Extra kanban cards and enter in Edit front corresponding to Extra kanban .