What do you sign prints with?
I recommend …
Pencil for matte surfaces.
Pigmented in for glossy surfaces.
A word of caution, “permanent” simply means waterfast, not light fast.
Sharpee pens fade.
Try Pigma pens instead.
Make sure your signature lasts as long as your prints.
Learn more in my free Lessons.
Learn more in my Fine Art Digital Printing Workshops.