Editing a file

:pwd     :pwd  			print the current directory name
:cd      :cd [path]  		change the current directory to [path]
:cd-     :cd -  		back to previous current directory
:file    :f[ile]  		print the current file name and the cursor
				   position
:file    :f[ile] {name}  	set the current file name to {name}
:files   :files  		show alternate file names