I only use a few apps and I'd really like to customize my buttons to them if possible
Sorry, no. Those direct-to-channel buttons have been paid for by the owners of those channels, and they are hard-coded into the remote. Different batches of remotes may have a different collection of channel buttons, but they are all hard-coded.
In addition to the standard channel buttons, the Voice Remote Pro has two more buttons that can be programmed to issue standard voice commands such as "Load [channel name of your preference]".
Voice Remote Pro (2nd Edition) has instead a key with a rocket on it which brings up a menu of 4 choices. At least two of them can be set to issue voice commands of your choice.
We’re upgrading Roku Community to bring you a faster, more mobile-friendly experience. You may notice limited functionality or read-only access during this time. Read more here.
Planned Downtime:
Community will be unavailable for up to 24–48 hours during the upgrade window during the week of May 19th and you may notice reduced functionality.
In the meantime, for additional assistance, visit our Support Site.
We're sorry for this disruption — we’re excited to share what’s next!