leading lines
Lines in a picture (real or implied) that guide the viewer's eye to a certain spot.
focal point
The part of an art work that the eye goes to first; the centre of interest.
illusion of movement
Making something look like it is moving in a picture that is really still.
force
A sense of push, pull, speed or power in an art work.
diagonal line
A slanted line, neither straight across nor straight up and down.
speed lines
Short parallel lines drawn behind a moving object to show speed and direction.
contour drawing
A drawing of the outer edges and important inside edges of an object, made by looking closely.