10.4 Keypad modes

     The VT100 and VT52 emulation protocols require that the cursor
     keys transmit different codes depending on the state of the
     remote application. Most on-line services follows the VT100
     recommendation for this, but several Editors and other programs
     have their own ideas of how this should be handled.

     If you enable the numerical keypad (Num Lock), the white cursor
     keypad will transmit the numerical application codes for
     VT100/VT52. If you have an extended (101/102) keyboard, the grey
     cursor keys will not follow the numerical keypad setting.

     By using the <Shift> key together with the white cursor keypad,
     you can negate the setting of Num Lock temporarily. Ie. if Num
     Lock is enabled and you press <Shift-Up> (8), the Terminal will
     transmit the up key sequence to the remote. If Num Lock is
     disabled and you press <Shift-Up> (8), the Terminal will transmit
     the numerical application keypad sequence for 8.