Hi Bipolarnutmeg,
Congrats on your first post in the Roku Community!
We understand that you want to know how to preset channel shortcut buttons. We can definitely assist with your inquiry.
First, can you please verify what type of remote are you using.?
Please be advised that you cannot re-program a channel button on any Roku remote that has a channel name printed on it but you can definitely arrange your home screen to your liking.
For full information on this, you can take a look at this link: How to move channels on your RokuĀ® streaming device | Official Roku Support
However, if you have a Roku Voice Remote that has personal shortcuts. This button creates a personal shortcut and with the press of a single button, you can launch a popular streaming channel, open the Live TV guide, issue an often-used voice command, and more.
To learn more, read the detailed article about creating a personal shortcut button.
Hope you'll find this info useful. Let us know in case you've still got any questions.
Best regards,
Mary