Well the only way I know of to do it is described below. So if yours doesn't have that option in it, or doesn't have the 3 dot menu, then it may well have been changed by the manufacturer. No news there, it is done on many devices. There is no way around it that I know of without rooting the device, which I would not recommend.
First, you need to be using a phone that is running at least Android "Marshmallow" (or newer) or be able to upgrade to it. Second, you will need the instructions I am including below. And third, you need a phone that has not been restricted by the manufacturer from making this change. Which does happen.
NOTE: If any of the steps are missing on your phone, or they don't work for you, then you have a phone that...