Card mode - Customize layout - Not able to remove columns from template

Testing the layout and customization options in card mode, I got an issue with the column layout handler. Once added a new column with (+), I’m not able to remove it from the layout definition. Is there a GUI support available to execute a column delete function in the card layout template?

Meanwhile I found a solution applying a more conceptual change. I’ve started as a simple spreadsheet adding the the tasks as rows and from that point, created the cards as a table view. Using this flow, I’m able to remove the columns at the original table and the change reflects at the template. The issue reported above only refers to pure card objects.