1. Button function

: Back to last edit.

:Redo last back.

: Copy the value on current cursor.

: Paste the copied value to current place.

: Clear all the text.

and
:Switch button mode.

: Cursor to left.

: Cursor to right.

: Newline character.

: Backspace,long press to delete from cursor to start of the line.

0
to
9
: Digital key.

.
: Decimal point.

=
: Begin to calculation.

+
: Plus.

-
: Minus.

×
or
*
: Multiply.

÷
or
/
: Divide.

()
: Brackets,for usage of complicated calculation with brackets.

^
: Power.

: Radical sign.

%
:One hundred percent sign.

:One thousand percent sign.

!
:Factorial sign.

E
:Scientific notation character,such as:2E-3=0.002。

X
,
Y
,
Z
:Variables, used for recalculating the equation by different values.

CNST
: Click to open constant list.

FUNC
: Click to open function list.

HEX
:Click to open hex converter UI.

XYZ
:Used for setting value of variable X,Y,Z.

OPRT
:Click for saving calculation text or lookup text history.

PRCS
:Used for setting the decimal digits.

2. Usage and note