Scientific Graphing Calculator keypad functions
Image Selector
:- 
This the general image pointer and selector button.
Image Move:-
This is the button to enable image moving.
Draw Line:-
Used to draw a line on the graphics screen.
Draw Rectangle:-
Used to draw a rectangle on the graphics screen.
Draw Solid Toggle key:-
Toggles On and Off the solid draw mode.
Draw Circle:-

Used to draw a circle on the graphics screen.
Draw Ellipse:-
Used to draw an ellipse on the graphics screen.
Draw Triangle:-
Used to draw a triangle on the graphics screen.
Draw Hexagon:-
Used to draw a hexagon on the graphics screen.
Rotate Hexagon:-
This will allow a hexagon to be rotated after being selected, using the
mouse down function on the graphics image.
Draw Parabola:-
Used to draw a parabola on the graphics screen.
Draw Hyperbola:-
Used to draw a hyperbola on the graphics screen.
Draw Text:-
Used to draw text on the graphics screen.
Change default color:-
Changes the default graphics drawing color.
Erase Selected item:-
Image eraser, will erase the selected image.
Sound On / Off:-
Toggle the sound mode On and Off.
Image On / OFF:-
Toggle visual help images On and Off.
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