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Appendix
The OPTION menu
The OPTION menu controls display contrast, memory checking and deletion
of data.
The OPTION display
Press @ o (S key) to show the
OPTION menu.
• Press j to return to the mode in which
you were working previously.
Contrast
Press 0 in the OPTION menu to show the
LCD CONTRAST display.
• Press + to darken the display and
- to lighten it.
• It is possible to lighten the display so much
that the calculator appears to be off. If the display remains blank when
you press X, press @ o 0 and then press +
repeatedly to darken the display.
Memory check
Press 1 in the OPTION menu to show the
MEMORY CHECK display.
• The amount of free memory in bytes is
shown on the first line. When the
calculator is used for the first time, the
following amount of memory is available.
[EL-5250] 4,096 bytes
[EL-5230] 1,280 bytes
• The figures after EQTN are the numbers of equations (Filing equations
functions) in the NORMAL mode.
• The figures after PROG are the numbers of programs stored in the
PROG mode.
For a detailed description of how memory is used, refer to ‘Memory usage’.
(See page 126.)
624BYTES FREE
EQTN: 15
PROG: 09
LCD CONTRAST
[+] [-]
DARK® ¬LIGHT
<OPTION>
ƒCTRST ⁄M.CHK
¤DELETE