Samsung PN51E6500EFXZA - Manual (Page 297)

keyboard attached and the QWERTY
keyboard is displayed, use your remote
to highlight and then select letters,
numbers, and symbols on the keyboard
one at a time.
N Select the Caps or Shift button to
display Capital letters. Select again
to re-display lower case.
N Select the 1 button to display
symbols and icons. Select again to
re-display letters.