Please follow these steps:

1. Go to Settings - > Integrations Settings - > App Store
2. Click on the Messenger to edit an existing one (or "Add" to create a new messenger)
3. From the dropdown menu choose the messenger you want to edit and click on the "pencil" icon to edit:

4. Go to the last slide in the messenger settings "Add Ons":

5. Choose from the options. Any of these must be under the same Brand:

1. Choose the knowledgebase you want to display. Only one knowledgebase can be displayed.
2. Choose as many popups you want to display.
3. Add any websites you wish to display. For example, a Calendly page or Google Forms.

6. Click Save.