Change default path ~/KICAD

How do we change default path of project ~/KICAD to another user wanted name ?

I think you need to say more about your OS, etc. But in Windows10, I can put my project wherever I want, and KiCad will remember recent projects. I can either launch KiCad to open recent projects or double click on the project file to open it.

Correct, it behaves so on any OS and got that on my own minutes after posting