Key Table: Iris (with PC keyboard)
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Notes
* The eight extra keys at the ends of the keyboard are known as linear keys.
  The four at the left, from top to bottom, are named L1 through L4.
  The four at the right, from bottom to top, are named L5 through L8.
* RoutingKey refers to any of the keys behind the text cells.

Default Bindings
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Special Modes
* enter/leave help display: L1+L2+L7
* enter/leave command learn mode: L1+L2+L3
* enter/leave preferences menu: L1+L2+L3+L8
* enter/leave status display: L2+L8
* set screen image frozen/unfrozen: L1+L2+L8
* describe character: L6+RoutingKey

Cursor Functions
* go to screen cursor: L7+L6
* bring screen cursor to character: RoutingKey

Vertical Navigation
* go up one line: L5+XtE0.73
* go down one line: L5+XtE0.81
* go to beginning of top line: L7
* go to beginning of bottom line: L6

Horizontal Navigation
* go backward one braille window: L5+XtE0.76
* go forward one braille window: L5+XtE0.78
* go backward skipping blank braille windows: L1
* go forward skipping blank braille windows: L8
* place left end of braille window at character: L3+RoutingKey

Clipboard Functions
* start new clipboard at character: L1+RoutingKey
* append to clipboard from character: L2+RoutingKey
* linear copy to character: L8+RoutingKey
* rectangular copy to character: L7+RoutingKey
* insert clipboard text after screen cursor: L2+L3
* insert clipboard history entry after screen cursor: L2+L3+L4, RoutingKey

Configuration Functions
* set text style 6-dot/8-dot: L4+L5
* set text style 6-dot: L2+L3+L7
* set text style 8-dot: L2+L3+L6
* set screen cursor visibility on/off: L4
* set alert tunes on/off: L1+L2

Internal Functions
* XT (set 1) keyboard scan code: Xt
* XT (set 1) keyboard scan code: XtE0
* XT (set 1) keyboard scan code: XtE1