VGUI build mode editor

I recently learned that when you have a vgui menu opened and you press SHIFT + CTRL + ALT + B it opens some type of VGUI Build Mode Editor. And i was wondering for those of you who know how to use it, how do you add a resources file so it will actualy save my buttons and panels and stuff that i add?

Number One: This has nothing to do with lua
Number Two: You cant save any changes made

Aight, thanks. And i thought since VGUI…lua…sorry.