* FILE

You can open or save a geometry file.







* A_POINT(plotting a point)

You can plot a point in the sketch window by selecting this command.








* A_LINE (drawing a line segment by selecting two points)

You can draw a line segment by selecting two points using this command. If you select a point that already exists on the line, it will become red.





* PERPENDICULAR(drawing a perpendicular line by selecting a line segment and a point)

Selections of a line (segment) and a point will generate a line perpendicular to the selected line (segment). 







* PARALLEL_L(drawing a parallel line by selecting a line(segment) and a point)

Selecting any line (segment) and a point generates a line parallel to the selected line (segment).







* INTERSECT_P(defining intersected point(s) of two lines)

 When you select two intersected objects like lines (segments), a circle indicates 

the intersection point(s). 










* CIRCLE(forming a circle by dragging from the center point)

 Selecting the center point and dragging away from it forms a circle.( You can move/enlarge/shrink the circle even after its formation.)








* HIDE_OBJECT(hiding a basic object like a point, a line, a circle, etc.)

You can hide a basic object like a point or a line (segment) by selecting the object.
 








* UNDO

You can undo the previous operation.







* LABEL

You can arbitrarily name any object such as a point, line (segment), circle, angle, length, etc. by selecting that object.






* COMMENTING

You can insert a comment at any place on the sketch window.









* MOVE_OBJECT(Moving a line or a point)

 Move the mouse close to any point or any line. If the object starts blinking or changes its color to red, you can move the object by dragging







* MEASURE_LENGTH(measuring the length between two points)

You can measure the length between two points by selecting them.









* MEASURE_ANGLE(measuring an angle)

You can measure the angle formed by selecting three points, with the second point of selection signifying the center of the angle













* ERASE

You can erase an object such as a point, line, label, comment, etc. 
 






* COLOR_IT

You can select a paint color from the color table and paint any object you select with the chosen color.









* SECTOR

You can form a sector by (1) plotting a center point, (2) pointing at the right end of the arc, (3) specifying the counter-clockwise angle from the right end of the arc with a click. The sector formed by this process can be colored using the COLOR_IT command.








* POLYGON

 You can form a polygon by selecting each consecutive node. The final node must be set at the initial node to close the polygon. The polygon formed by this process can be colored using the COLOR_IT command.









* PRINT

You can print the geometrical shape on the sketch window


