[GWN] re: correct key stoke for the at sign

[shannon]

I have heard different answers for the correct keystroke on the Braille sense 
plus for the at sign.  Could someone steer me perhaps to a table of keystrokes 
for computer Braille keystrokes using the Braille sense plus with the Braille 
keyboard? Is there an onboard list of key stroke commands somehow on the note 
taker itself?