Cmd-Shift-Rightarrow

Move to the end of a line of text:

Cmd-Rightarrow

Select to the start...

Cmd-Shift-Leftarrow

Move to the start...

Cmd-Leftarrow

Select to the end of everything...

Cmd-Shift-Downarrow

Move to the end of everything...

Cmd-Downarrow

Select to the start of everything...

Cmd-Shift-Uparrow

Move to the start of everything...

Cmd-Uparrow

Select forwards, character-by-character...

Shift-Rightarrow

Select backwards, char by char...

Shift-Leftarrow

... you get the idea.

So if I want to start at the top of this posting, and select every line, line-by-line I go:

Cmd-Uparrow, Cmd-Shift-Rightarrow, Shift-Downarrow (line by line)

It's powerful, when you get used to it, because it's quite 'chord-like'. Not that it stops me typing:

1-Shift-G, Shift-G, Ctrl-E, Ctrl-Y and 'esc :wq'

... but, as always, [fx: Klingon voice] "Today is a good day to VI!"
--
simon