I have one of the various Dell laptops that actually has 5 buttons around the trackpad (a Latitude E5550):
I really like the middle mouse button and use it quite often, so I would like to use the middle button above the trackpad as a middle mouse button. However, I can't find any way to do it. Its default function is to allow scrolling with the nipple when held down, but I never use that functionality so I don't care about that. Also, I'm aware of the "middle click emulation" by holding left and right buttons down at the same time, but it's not really what I want.
I want to be able to map pressing the middle button to a middle click, simple as that. Using the latest version of the Dell "touchpad properties" software, I look through its interface and I don't see anywhere I can customize the functionality of that middle button. So is there a way to do it?