If you have created favourite styles and wish to rename them, please follow these steps;
1. Go to File Options Favourite Styles
2. Select the catalogue you wish to rename a favourite style from and then select the favourite style.
3. After you have selected the favourite style, click Rename to rename the favourite style.
4. You will then see the below window. Click OK after you have renamed the favourite style.
If you wish to delete a favourite style, please refer to: How to Delete a Favourite Style in 2020 Fusion