The article describes the methods of development of design documents in the geometric modeling environment SolidWorks. Special attention is paid to the main design document (DD) – Specification. For the proposed valve design, the creation of a specification for the entire product, as well as the specifications of the assembly units included in the product, is considered. Examples of specifications for drawings are given: assembly, general type, drawings with a loose part and for combined DD. The examples considered in the article contribute to the formation of students' practical skills in the image of products and their components using the SolidWorks modeling system, the development of the ability to read drawings, as well as the deepening of knowledge of the state standards of the Unified System of Design Documentation (USDD).