Emacs Key Bindings: C-h C-h and see all Help option or C-h b see this
C-x f search recent file
C-h c C-p display a very brief descrition of the command
M-g-g Go to line
C-o or C-j Open a new line on the top of current line and move cursor to newline / insert newline above
C-x C-= Zoom out / enlarge font
C-x C-- Zoom in
C-x C-0 default