IBM 3270 - What Do the Keys Do

Using Toggle Keys
The toggle keys work like switches. Press them
once to turn them on, and press them again to
turn them off. For example:
WS
Ctrl
Try pressing these keys to see how they work.
What Do the Keys Do?
If you want to know what a key does, you can
look it up in Appendix B in this book .. Appendix
B contains a table that is divided into sections by
keyboard area.
3-6 Book 3 - Using the Control Program