After clicking the file, you can see the menu on the left side of the panel. Click the last option to open the word options panel, and then you can set word in the panel.

After opening the word options panel, find the General submenu. Generally, the "General" submenu is entered by default. If not, you can click to enter. After entering, we can set it on the right.

After entering the general submenu, find the "Personalized Microsoft Office" sub-item in the right panel, where you can modify it. We changed the user name to our own name, such as Garfield here.

After modifying the user name, click "OK" to take effect.