IBM Asynchronous Color Terminals WS525 - Manual (Page 28)

Desktop Features
3.2 Keyboard Summary
Accessibility aid
This feature allows a user with limited motor skills to use
modifier key combinations in a sequential manner rather than in
a simultaneous manner. All modifier key combinations are supported.
There are two operation states—Latch and Lock. The Latch state
affects only the next key pressed. When in the Lock state, all keys
pressed are affected by the modifier until you press the same modifier
key again or press any other modifier key twice. A small icon,
indicating the state, is displayed on the Keyboard Indicator Line
or the Status Line.
To enable: Press any modifier key five times.
Latch state: Press any modifier key once.
Lock state: Press any modifier key twice.
To disable: Press and hold a modifier key while you press
another key.
Review previous lines
In Set-Up or through software, you can allocate the pages that are
assigned to each session, up to a total of nine pages. When Review
previous lines is selected, the page memory allocation for a session
becomes a single page and a scroll back buffer. You can then use
Ctrl ✁
and
Ctrl
✂
keys to scroll up or down to review lines previously scrolled
off the screen. (Note: When this feature is enabled, the host cannot
write to specific pages, and control codes from the host are ignored.)
3–6 Desktop Features