the purpose of technical drawing is to let the viewers know what your drawing is all about!
The purpose of using a drawing fixative is to protect and preserve the artwork by preventing smudging and fading of the drawing materials.
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There are many sites available that offer online drawing. These drawing sites include, but are not limited to, Autocad online, Google Sketch-up, and Google Draw.
it produces music...
The best application on the Google Play store for drawing animation is FlipaClip, especially if you are a beginner or a casual animator.
For Shading your drawing
because it is fun
because it is fun
to generate a topic
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The answer depends on the purpose. For example, the accuracy required from an engineering drawing is much greater than a child's drawing of his house.