They simply used straight edges of wood.
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rulers,pencils,pens and so on..
Anything that you didn't trace or use tools like rulers, french curves... is technically considered "freehand." Freehand is distinguished from Technical Drawing.
A pantograph can be used to trace a drawing by placing a point on the existing drawing and using another point, side by side, on the other paper drawing out the particular drawing. A pantograph looks like a is two rulers in the shape of a "V" that are connected by 4 points. One "V" is inverted.
There are many tools that are used for technical drawing. Items such as pens and rulers are common manual tools that are used. It is becoming very common for computer-aided tools to be used.
To express how one feels without a subject is deeply personal and as the way someone free hand draws is a way to express their life everything they have done through out their life has shape their style and subject of free hand drawing to express their self with only what they see in their minds can have a impact on people lives free hand drawing can show skills and craftsmanship in drawing without other methods of drawing