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Calculator graphics 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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