The bookmark name contains numbers and special characters, so the Add button is grayed out, so the bookmark cannot be added.

WPS bookmark method:

Tools/raw materials

Computer wps

Methods/steps

1. First, open wps and create a new wps document.

2. Drag the mouse to select the text to bookmark.

3. Click "Bookmarks" on the menu bar above.

4. Enter the book signature and click "Add".

5. Click the "Book" button again, and then click "Locate" to find the location of the bookmarked article. WPS bookmark was successfully added.