How do I draw a box using oblique projection, and what are the key steps and characteristics of the final drawing?

Start by drawing a rectangle or square to represent the front face of the box. This face is drawn in its true shape and size.

From each corner of the front face, draw parallel lines extending backwards at an angle. A common angle is 45 degrees, and these lines are often drawn at half their true length to create a more realistic appearance (this is called cabinet projection).

Connect the ends of the receding lines to form the back face of the box. The lines forming the back face should be parallel to the corresponding lines on the front face. Use dashed lines for edges that would not be visible from the chosen viewpoint.

Here is a description of the final drawing:
A rectangular prism (box) where the front face is a true rectangle. From each corner of this front rectangle, lines extend diagonally backwards (e.g., at a 45-degree angle). These diagonal lines are parallel to each other and are typically drawn at a reduced length (e.g., half the actual depth of the box). The ends of these diagonal lines are then connected to form the back face, which is also a rectangle parallel to the front face.