The Chat standalone widget allows the customization of the Chat Badge and the Chat Window. See Customizing the chat widget for details.
When using the chat component of the Web Widget, those options are no longer available.
Those settings are available to Chat-only widgets. If the Help Center/Contact form options are enabled in the Web widget, some settings will not appear in the Zendesk Chat dashboard. See Missing Chat widget settings for more information.
- Click the Admin icon in the sidebar, then select Channels > Web Widget and deactivate all the options, other than Chat.
- Sign out from Chat and sign back in, to refresh the connection.
- The options Chat Window and Chat Badge appear under Widget > Appearance.
See Can Chat widget customizations carry over to Web Widget after Chat is enabled? for further details on using both widgets together.