Turning Power On And Off; Adjusting Display Contrast; Key Markings - Casio fx-991ZA PLUS II User Manual

Turning Power On and Off

• Press to turn on the calculator.
• Press (OFF) to turn off the calculator.
Note
• The calculator also will turn off automatically after approximately 10 minutes or
approximately 60 minutes of non-use. Press the
on.

Adjusting Display Contrast

1. Press (SETUP)
2. Use and to adjust display contrast.
3. After the setting is the way you want, press
Important!
• If adjusting display contrast does not improve display readability, it probably means
that battery power is low. Replace the battery.

Key Markings

Pressing the or
alternate function of the second key. The alternate function is indicated by
the text printed above the key.
(1) Keycap function (2) Alternate function
• Characters enclosed in brackets (┌ ┐) that are the same color as i are
used in the CMPLX Mode.
• Characters enclosed in brackets (┌ ┐) that are the same color as DEC,
HEX, BIN, and OCT are used in the BASE-N Mode.
( CONT
key followed by a second key performs the
6
key to turn the calculator back
).
.