It’s possible to automatically redirect to a identity provider instead of displaying the login form. To enable this go to Authentication select the Browser flow. Then click on config for the Identity Provider Redirector authenticator. Set Default Identity Provider to the alias of the identity provider you want to automatically redirect users to.

If the configured default identity provider is not found the login form will be displayed instead.

This authenticator is also responsible for dealing with the kc_idp_hint query parameter. See client suggested identity provider section for more details.