1. First, open the WeChat public platform and log in to WeChat WeChat official account.

2. Secondly, click the material management option to enter the material management interface.

3. Then, click the new graphic message option to enter the graphic message editing interface.

4. Then, enter the title and content in the text, and you can use the format options in the toolbar to typeset the text.

5. Then, if you need to add a picture or video, you can click the picture or video icon in the text and select the picture or video to upload to add.

6. Finally, after editing, click the "Save and send in group" option to send the copy to the target audience.