CAD is a powerful institutional tool, not only can draw, can fill rich patterns, but also can attach JPE format pictures into the scene, of course, can also make a very standard door elevation.
Open the software and click the Rectangle tool on the left, or the REC shortcut key and press the space.
Click on the blank space, open the rectangle, enter the numbers @800,2150, this is the width and height of the door.
Give the previous deviated command, or press the shortcut key O.
The deviated figure is actually the width of the door line, generally around 800-100MM.
You see 2 rectangles, all very standard in size. The outside is the line of the door, the inside is the line of the door.
Finally add and modify the door line. Select the outer rectangle, form a dashed line, and trim as necessary.
Now add the corrugated representation of the door line. Add a solid wood pattern to the top and bottom.
After offset, trim TR, symmetry, in the past, it has become a more three-dimensional door.
Instead of forgetting that you need a lock, place the lock in the middle of the door and remove the label.
It still doesn't feel perfect inside. Add some solid wood lines, more concave and convex, strong texture.