The number of signatures in Genshin Impact has reached the maximum. If you want to delete the signature, you can follow these steps:

Open the Genshin Impact game and enter the main interface.

Click the "Paimeng" icon in the upper left corner to enter the personal information setting interface.

In the personal information setting interface, find and click the "Edit" button.

In the editing interface, you can see the signature option. Click the Delete button next to the signature.

Confirm the deletion operation to successfully delete the signature.

Please note that the above steps are for reference only, and the specific operation mode may be slightly different due to the game version update or personal operation habits. If you have any questions, feel free to come to me.