1, the use of a protractor

Center alignment Protractor ruler edge mapping vertices of the Horn, and protractor scale line coincides with the baseline you can foot-side plotting various angles .

2, brushes and circular curve

Put the pen into the ulnar side of the little hole in the Center, another hole to insert another pen, total rotation 360 degrees, you can draw a circle, RADIUS between two holes, or different, you can have different circle or arc.

3, draw a horizontal parallel lines

Hand-foot-body along the ruler to draw a horizontal line, and then the foot moves up and down, you can draw horizontal lines

The distance between parallel lines in the count window on the scale indicated.

4, draw vertical lines

Inserted into the ulnar side of the small hole in the tip, sliding ruler to draw one vertical parallel lines; its length can be determined by counting the window the tick indicates.

5, use the ruler to draw the vertical parallel lines features, you can easily draw a variety of graphics to open