Signature Field Settings in Source

Hi Frappe Community,

does anyone know where I can find the exact URL and settings of the style of signature field used in frappe field types. I am handing over a signature field, but I cannot get the format right as the display in frappe signature field is without the predrawn line and in another aspect ration and size.

External I use this js now: https://cdn.jsdelivr.net/npm/signature_pad@5.0.7/dist/signature_pad.umd.min.js

Can anybody help please?

Have a nice week.