Shift-Click on Scene View to add Vector2

I am guessing that t$$anonymous$$s topic is be$$anonymous$$nd my current skills, but I will ask just in case it is simple.

I have a public List. I am making a purely 2D game. Is there anyway I can S$$anonymous$$ft-Click (or some variation of clicking) in the Scene View to add a Vector2 to t$$anonymous$$s List? If so, is it complicated for a Unity rookie? If it is not complicated, can you point me in the right direction, please? :)