See Emacs_Reference 

General Commands
     
     
save:     ctrl-x ctrl-s
     
exit:     ctrl-x ctrl-c 
     
cut:     ctrl-k        
     
yank(paste):     ctrl-y 
     
open directory:     ctrl-x d 
     
split window:     ctrl x 2 
     
new window:     ctrl x 5 2 
     
latex:   ctrl c ctrl c 
     
goto top of file: Alt < 
     
goto a line: type Esc x, then type "goto-line", then hit
     enter, then type the line number 
Rectangular Cut and Paste

Step 1: Select the rectangle of text to cut
     
     1)Put cursor at upper left corner
     2)Ctrl-Space
     3)Put cursor at bottom rigtht corner
     or, just use the mouse

Step 2: Cut and paste     
     4)ctrl-x r k (to cut)
     5)ctrl-x r y (to paste)

Auto Format
 
Esc q