"What is middle click?"
- my grandma, who has a scroll wheel in the middle of her mouse
- my grandma, who has a scroll wheel in the middle of her mouse
If she can use a computer and browse the web, she can learn to use the mouse she owns.
[Note: props to your grandma]
Edit: Wait, maybe you're referring to a mouse that has the wheel but the wheel isn't a button? In that case, the GP could have said "right click, open image" rather than "middle click". Same thing.
Most of them use the right click drop down option.
"And have you seen my medication?"