HP 42S - Manual (Page 14)

3.3 The ▀ CUSTOM menu
This is not related to memory but as we saw the FCN function in the CATALOG menu we are
already able to talk about it.
The HP-42S calculator has a lot of functions. And it is not a good idea to find the function you want
every time in the FCN or to use every time XEQ “function name”. To solve this problem HP-42S
has the CUSTOM menu which can contain function you personally select.
To do this we use ▀ ASSIGN. When you call this you can select a function from FCN and also
some other things. We are interested in functions so press FCN. Now you find the function you
want and then you press the position you want it appears in the CUSTOM menu.
Example: Let's put ABS (absolute value) in the first position of CUSTOM menu.
▀ ASSIGN FCN ABS
In the display you are going to see:
ASSIGN “ABS” TO _
Then you pick a position, for example if you have ▄ ▄ ▄ ▄ ▄ ▄ and you press the first ▄ your
CUSTOM menu will become ABS ▄ ▄ ▄ ▄ ▄.
As you can see the CUSTOM menu has also the
▼▲
symbol which means there are more than one
line. There are three lines you can use when calling ASSIGN function which means 18 available
positions.
(I would like to use this space to make a complain.:) There are some HP models with more than
2000 functions! Many functions does not mean always power but always mean complexity!)