>>> А как-то открыл Emacs, так вот там реально не нашёл как выйти...
>> С-h ?
>> С-h t
>> C-h b
>> C-x C-c
> Ещё дойти надо до этого самого цэ-хэ.

Вообще-то по умолчанию есть менюшка. Что в консоли, что в икасх.
Там можно и мышкой/стрелками нужное действие выбрать, да и хоткеи тоже вполне показываются.

 File > t Options Buffers Tools Development Help                                                                       
 Visit New File...              C-x C-f -------------------------------------------------------------------------------
 Open File...                                                                                                          
 Open Directory...              C-x d                                                                                  
 Insert File...                 C-x i                                                                                  
 Close                                                                                                                 
 --                                                                                                                    
 Save                           C-x C-s                                                                                
 Save As...                     C-x C-w                                                                                
 Revert Buffer                                                                                                         
 Recover Crashed Session                                                                                               
 --                                                                                                                    
 Print Buffer                                                                                                          
 Print Region                                                                                                          
 PostScript Print Buffer                                                                                               
 PostScript Print Region                                                                                               
 PostScript Print Buffer (B+W)                                                                                         
 PostScript Print Region (B+W)                                                                                         
 --                                                                                                                    
 New Window Below               C-x 2                                                                                  
 New Window on Right            C-x 3                                                                                  
 Remove Other Windows           C-x 1                                                                                  
 --                                                                                                                    
 New Frame                      C-x 5 2                                                                                
 New Frame on Display...                                                                                               
 Delete Frame                   C-x 5 0                                                                                
 --                                                                                                                    
 Quit                           C-x C-c 

Но да, это было бы слишком просто – совсем без превозмогания или тройного сальто с двойным переворотом и хлопком ушами  ;)