Hi, @kunolnu1
Welcome!
Thanks for reaching out and I see that you are exploring the Roku streaming platform.
Switching between channels on your Roku device depends on which app you are using. The Roku Live TV Channel Guide features over 500 free live TV channels available on The Roku Channel. You can change channels by using the arrow buttons on the remote.
To open different apps on Roku, simply press the Home button, navigate to your app list, and select the app you want to access.
Hope this helps, and let us know if you have further questions or clarifications.
Thanks,
Roku Community Team.
Takashi O.
Roku Community Moderator