In our lectures or tutorials we frequently use the freehand technique. Successful technical freehand drawing does not require talent. It does however, require skills, which can be learned. The same rule applies in drawing curved lines, which is to be done with only one stroke. Furthermore, an attractive drawing on the blackboard is ineffective if our lettering is poor.
Technical drawing includes technical lettering.
Standard block letters are the most popular and easiest to be read. Finally, the addition of some colours, and shadows, which can greatly contribute in explaining of our ideas, ensures that information has been transferred to the audience in a very clear and quick way. Freehand Drawing Lectures . Faculty of Engineering, The University of Western Australia. Graphis Diagram 1.