How do you sketch sketch of a chromatogram?

people abstract ideas landscapes cartoons scenery So really you can sketch anything u like....its all up to you.

CAD sketches are more accurate and precise and they can be communicated faster and easier

CAD is a software which can lose information and must be learned to be properly used. Also, freehand sketches can easily have information be added.

They are wayy better

It is not that very detailed.