What is freehand drawing or sketching?

Related questions

1. How are sketches useful?
2. What was the first drawing?
3. Why do engineers use sketches?
4. Is sketching an art?
5. What do you call a person who sketches pictures?
6. Why should you sketch?
7. Is drawing an art?
8. Is a sketch a drawing?
9. Can I learn drawing?
10. Is drawing a talent or skill?

Tags

1. #drawings
2. #drawing
3. #sketch
4. #freehand
5. #artists
6. #perspectives
7. #straightedges
8. #without
9. #artist
10. #pictorial
11. #generally
12. #synonym
13. #instruments