Jam Mode Editing

Hi; I’m very excited I was finally able to purchase the Dreamfoot App today. I’m starting to go over the tutorials but between tutorials I experiment with the App. I was able to add chords to the boxes in the Jam Mode but I can’t seem to discover how to delete a chord I added. I don’t see an “X” in any corner of the chord box. How do I delete an unwanted chord?

Thanks in advanced for your help!

Victor