The phrase "mode button" refers to a button on a device or equipment that allows you to switch between different functions or settings. Full definition
No, we don't mean they stuck a drive mode button in there to ever so slightly alter the transmission shift points and called it a day. (bestride.com)
The best feature has to be the dedicated power saving mode button on the left side. (indianexpress.com)
The new model gets 37 mpg on the highway and, while the improved suspension and available paddle shifters and sport mode button provide a fun and exciting drive. (sloanetoyotaphiladelphia.com)