IBM 5291 1 Operator's Manual page 32

Selecting Functions on the Bottom Row of the Keyboard Template
To select the command functions shown on the bottom row of the keyboard
template (1 through 12 and Test Request):
1. Press the
El
(Command) key.
2. Press the top row key that is directly below the keyboard template
indicating the program function desired. Pressing any other key causes an
error.
To cancel the selection procedure after you have pressed the Cmd key, press
the Error Reset key.
Note: If you press the Cmd key and the Error Reset key at the same time, the
cursor changes from an underscore to a solid rectangular block. This is
explained in Choosing the Cursor in Chapter 1.
Selecting Functions on the Top Row of the Keyboard Template
To select the command functions shown on the top row of the keyboard
template (Display Mode, 13 through 24, and Clear):
1. Press the
B
(Command) key.
2. Press and hold an
8
(Uppershift) key. (The Uppershift key must
be used even if the Keyboard Shift indicator is on.)
3. Press the top row key that is directly below the keyboard template
indicating the program function desired. Pressing any other key causes
an error.
To cancel the selection procedure after you have pressed the Cmd key,
press the Error Reset key.
Keyboard 2-3