I was trying to implement my own scratch buffer.I learned alot about Emacs’s way of programming. I gained a new mental debugging tool. The main function I started to modify is doom/open-scratch-buffer. The functions deals with opening scratch buffer when current-buffer is inside and outside of a projectile’s project. doom/open-scratch-buffer does the following check if scratch will open in the same buffer or as pop up buffer Then, it passes arguments to (doom-scratch-buffer &optional DONT-RESTORE-P MODE DIRECTORY PROJECT-NAME).