1. Double-click to open the AI software, and ctrl+n creates a new file with a suitable size.
2. In the toolbar on the left side of the software, select the rectangle tool.
3. Draw a rectangle on the drawing board and open the stroke. By default, the stroke is centered.
4. Click the window in the options bar above Stroke.
5. In the stroke window, click the external alignment in the aligned stroke.
6. After modification, you can see that the rectangular strokes are changed to the outer strokes.