n - toggle display of line numbers
a - append / input text AFTER current line
c - clear / erases the current line and starts input from current line
i - insert / input text BEFORE current line
e - erase / erases current file in memory, and loads new file specifed
g/re - search for expression "re" and print instances
h - help file
l - list lines specified
m - move specified line/range to a line AFTER specified address
q - quit
Q - quit
r - read specified file into buffer at current line
w - write [ file ]
                                                         edit (end)