Cad clipping boundary preserves boundary.

The reason why CAD cuts the boundary and keeps the boundary is to clearly present the required boundary information in the drawing and keep the drawing clean and readable. By cutting the boundary and keeping the boundary, we can highlight the key content of the drawing and make it more intuitive and easy to understand.

Extension: Cutting boundary and retaining boundary play the following important roles in CAD design:

1. provides a clear boundary: cutting boundary and retaining boundary can clearly define the boundary range of drawing, so that designers and browsers can accurately identify the size and range of drawing. This is very important for designers to measure, layout and composition.

2. Keep the drawing clean and tidy: cutting off the boundary and keeping the boundary can remove unnecessary parts in the drawing and make the drawing cleaner and more concise. In this way, people can focus more on key information when browsing drawings, and will not be disturbed by messy content.

3. Improve readability: Retaining the border can make the drawing more readable, which is convenient for designers and other relevant personnel to quickly understand the information conveyed by the drawing. The existence of the border can help people to better distinguish the main content and auxiliary information in the drawing, and reduce misunderstanding and confusion.

4. Convenient for subsequent editing: Retaining the border can provide convenience for subsequent editing of drawings. When drawings need to be modified or added, the border can be used as a reference to help designers better adjust and lay out new elements and maintain overall consistency and aesthetics.

Therefore, cutting and retaining borders play an important role in CAD design, which can not only improve the readability and neatness of drawings, but also provide convenience for subsequent editing.