Help for ABT and Delphi Models
From left to right, front keys are:
PROG HOME CURSOR   UP  LEFT  RIGHT  DOWN

Movement keys:
UP              up one line
LEFT            left one full window
RIGHT           right one full window
DOWN            down one line
CURSOR          go back to cursor, or to window location before cursor moved
CURSOR + LEFT   left one half window
CURSOR + RIGHT  right one half window
HOME            top left of screen
HOME + UP       top of screen
HOME + DOWN     bottom of screen
HOME + LEFT     beginning of line
HOME + RIGHT    end of line
PROG + LEFT     left one character
PROG + RIGHR    right one character
CURSOR + UP     up to previous line with different attributes
CURSOR + DOWN   down to next line with different attributes
HOME + CURSOR + UP    skip to previous different screen line
HOME + CURSOR + DOWN  skip to next different screen line
PROG + HOME + UP      go up to previous command prompt
HOME + CURSOR + cursor routing button  position left end of window

Other functions:
PROG            toggle help display
PROG + HOME     toggle attribute display
PROG + HOME + cursor routing button  show color attributes of pointed char
PROG + CURSOR   activate preferences menu
PROG + UP       toggle status mode
PROG + DOWN     toggle freeze mode
HOME + CURSOR   toggle cursor tracking

Cut & Paste function keys:
PROG + cursor routing button     defines the beginning of a block
HOME + cursor routing button     defines the end of that block
PROG + HOME + DOWN               paste the block at cursor position

Speech complement functions (if available):
HOME + CURSOR + RIGHT   say the text from the current screen line
HOME + CURSOR + LEFT    mute speech device
PROG + HOME + RIGHT     speak from current line through bottom of screen
PROG + HOME + LEFT      reinitialize speech driver

Functions with the 3 cursor routing buttons over the status cells:
Button 1              toggle capital letter blink
Button 2              toggle cursor visibility
Button 3              toggle cursor blink
CURSOR + Button 1     toggle text style 6-dot/8-dot
CURSOR + Button 2     toggle cursor style block/underline
CURSOR + Button 3     toggle sliding window on/off

Note: Some Alva models have extra keys called CURSOR2, HOME2 and PROG2.
Those keys are not bound to any function yet.
If you have suggestions for them, please send me an e-mail to nico@cam.org.