A:Answer Noted here: by user "Gomad"...
https://community.roku.com/t5/Roku-Developer-Program/How-about-quot-programmable-quot-A-B-buttons/td-p/465414
"The remote also has a pair of programmable buttons. Hold either one down for a couple of seconds, and it’ll map to whatever voice command you entered last through the Roku remote’s separate microphone button. The most obvious use for this is launching specific apps, but you could also program a search for your favorite TV genre or have a button that launches music directly in certain apps, such as Pandora. It’s a neat feature, though it’s inherently limited by what Roku let’s you do with voice control on its platform."
