An instruction manual is a type of applied writing that provides a relatively detailed description of a thing or object, making it easier for people to understand and learn about it.
Instruction manuals must be factual and straightforward, stating things as they are, without exaggerating the product's functions or performance to achieve a certain purpose. Instruction manuals should comprehensively explain things, not only introducing their advantages but also clearly explaining precautions and potential problems.
Product manuals, user manuals, and installation manuals generally use descriptive text, while instruction manuals for theatrical performances can focus on narration and expression of feelings. Instruction manuals can use various formats such as pictures and charts, depending on the situation, to achieve the best explanatory effect.