Various commands

CTRL-L  	   CTRL-L	clear and redraw the screen
CTRL-G  	   CTRL-G	show current file name (with path) and cursor position
ga  		   ga		show ascii value of character under cursor in decimal, hex, and octal
g8  		   g8		for utf-8 encoding: show byte sequence for character under cursor in hex
g_CTRL-G  	   g CTRL-G	show cursor column, line, and character position
Q  		   Q		switch to "Ex" mode