# Operating User-defined Keys; Un-assigning A User-defined Key; Assigning Multiple User-defined Keys - HP 50g User Manual

Graphing calculator.

## Operating user-defined keys

To operate this user-defined key, enter „Ì before pressing the C key.
Notice that after pressing „Ì the screen shows the specification 1USR in
the second display line. Pressing for „Ì C for this example, you
should recover the PLOT menu as follows:
If you have more than one user-defined key and want to operate more than one
of them at a time, you can lock the keyboard in USER mode by entering
„Ì„Ì before pressing the user-defined keys. With the keyboard
locked in USER mode, the specification USR will be shown in the second
display line. To unlock the keyboard press „Ì once more.

### Un-assigning a user-defined key

To remove the assignment performed above, use function DELKEYS, as follows:
ALG mode:
RPN mode:

### Assigning multiple user-defined keys

The simplest way to assign several user-defined is to provide a list of commands
and key specifications. For example, suppose that we assign the three
trigonometric functions (SIN, COS, TAN) and the three hyperbolic functions
(SINH, COSH, TANH) to keys A through F, respectively, as user-defined
keys. In RPN mode use:
{SIN 11.0 COS 12.0 T N 13.0 SINH 14.0 COSH 15.0 T NH
16.0} ` STOKEYS `
In ALG mode use:
STOKEYS({"SIN(" , 11.0, "COS(", 12.0, "T N(", 13.0,
"SINH(", 14.0, "COSH(", 15.0, "T NH(", 16.0}) `
Operate these keys by using, for example, in RPN mode:
5„ÌA 4„ÌB
2 „ÌD 1„ÌE 2„ÌF
DELKEYS(13.0)
13.0 ` DELKEYS `
6„ÌC
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