I've a suggestion: a technical draw is a very important tool for make easy understandable the manufacturing process and quality control of a large variety of products whose representations will be very different. In this sense we need mechanism to modify those representations: make drafts in it, modify "with one click" properties of individual or groups of points, lines, faces or bodies, texts. In example the following cases:
1. A gear arrangement draw have too much information, for simplify views we hide or paint white a group of lines and sketch some conventions.
2. Drawing fabric products we use colors in surfaces to differentiate distinct layers of materials and highlight individual lines that represent joints.
3. In large part lists commonly we need to modify a specific text box without the needing of recompute the whole table.
It's a very useful software!
just pay more attention to the technical draw module. The examples bellow: