Optelec
English
Page 28
7. Using the Braille keyboard
This chapter gives an overview of the Braille key combinations to emulate keyboard
function keys. There are two types of function keys; chord commands to emulate
keyboard function keys and prefix chord commands to emulate function key
combinations.
7.1 Chord commands
Chord commands are Braille key commands in combination with the space bar.
These chord commands are used to emulate keyboard function keys such as Home,
End, Backspace, Delete and Escape. Please refer to the figure below for an overview
of the chord commands:
Chord command
Keyboard key
Backspace
Space + b12
Escape
Space + b15
Delete
Space + b45
Page up
Space + b13
Page down
Space + b46
Home
Space + b123
End
Space + b456
Tab
Space + b56
Shift-Tab
Space + b23
Shift-Space
Space + b7
7.2 Prefix chord commands
There are three prefix chord commands to emulate the function keys F1 to F12
(Space + b124 for activating F, followed by the number 1 to 12), Insert (Space + b24)
and Caps Lock (Space + b14) combinations.
To press one of the function keys F1 to F12, press Space + b124 (Space + F)
followed by a character. The function key number is represented by the characters
“a” to “I” whereby the character “a” represents F1 and “I” represents F12. To press F1
using the ALVA BC640 Braille keyboard, first type space + b124 followed by the
character “a” (Braille key 1). Press the Space + b124 combination again to exit this
function.
Similarly, the Insert and Caps Lock can be typed by pressing Space + b24 for Insert
and Space + b14 for Caps Lock. To type an J command, press Space + b24
followed by a “j” (Braille keys 2, 4, 5). Typing the Insert or Caps Lock command twice
will switch the status of this command on or off, depending on the current status.
