1. First open the CAD software and click the "S" key, as shown in the figure below, and then go to the next step. Secondly, after completing the above steps, select the object to be stretched, as shown in the figure below, and then go to the next step.

2. When you enter s, it is equivalent to the computer asking which "object" you want to stretch (the object is what you want to stretch). If it is a rectangle, do you want to stretch one corner or two corners? It has something to do with your choice.

3. First, the computer opens CAD and draws a square, as shown in the figure below. Secondly, after completing the above steps, enter the command stretch and press the space bar to confirm, or directly enter the shortcut command "s", as shown in the figure below. Then, after completing the above steps, cross-select the graphics, as shown in the figure below.

4. The s in the 4.cad box is a stretch command. S is the shortcut key for stretching. When you enter s, it is equivalent to the computer asking which "object" you want to stretch (the object is what you want to stretch).