How to set user command in Qt Fakevim?

[justforfun]

(1) For example, I want to set @map gd g*@ in Qt's Fakevim, but how to do it?

(2) And also I'd like to set F3 as the save command, how to do it?

(3) In Fakevim, it provides an option "Read .vimrc", but where to find the file .vimrc?

Thank you!