I am not sure if it is actually possible, but here it goes: on MX Anywhere 3 mice, one can press either lateral button and combined it with the scroll to scroll horizontally. That is fantastic, but currently both buttons do the same! It would be, honestly, the best thing ever for these mice to be able to configure those buttons to change slider configurations, e.g., volume, birghtness, etc., just as one does for scrolling horizontally (click one of the side buttons and scroll = volume control), but instead of wasting the capacity of one button, you can have one button for each, or change it depending on the application. It would be the most awesome thing!