Because they make the picture.
cuz then the lines are straight.
One important element of drawing is understanding and practicing the use of line work. Lines can convey shape, texture, and depth, and mastering different types of lines can greatly enhance the impact of a drawing.
Drawing Black Lines was created on 2000-03-21.
DSDGER
Hidden lines.
5 lines
A drawing of a 30 degree angle!
Gerrymandering
No
Used for drawing horizontal lines. To support set squares when drawing vertical line and inclined lines.
when you do a drawing using only lines
By dashes.