The custom menu of WeChat subscription number can be set in the background of WeChat official account.

The specific steps are as follows:

1. Log in to the background of your WeChat public platform, find "Custom Menu" in "Functions" on the left, and click Enter.

2. The menu can be added at "+"and the menu content can be set on the right. You can add up to 3 first-level menus and 5 submenus. Click "Save and Publish" to set successfully.