1. First, click the file button in the upper left corner of the page and select "New".
2. Click OK in the new window that opens.
3. Click the Rectangular Tool option in the left toolbar, or other shape tools.
4. Draw a rounded rectangle on the new canvas.
5. Draw multiple rectangles and connecting lines according to typesetting needs.
6. Click the "T" icon to select the horizontal text drawing tool.
7. Draw a text box in the drawn rectangular graph and enter the text.