Useful Commands

Copying and consists of marking at the beginning of the text to be copied, then copying with the cursor at the end of the text to be coppied. To paste, 'yank' it back to the buffer.

C-space                  set mark
C-W                      cut all text between mark and cursor
M-W                      copy all text between mark and cursor
C-y                      paste

C-shift-_                undo
C-x C-s                  save
C-x b                    list buffers
C-x C-c                  quit
C-x b                    change buffer