Refer to:https://support.plezmo.com/support/solutions/articles/65000069073-2-1-button#2.1.1.whenever-the-selected-button-%C2%A0is-clicked
https://support.plezmo.com/support/solutions/articles/65000068523-2-6-label#2.6.1.Show-something-on-the-selected-app-label-element.%C2%A0
Advay.sawant