unable to edit layers panel in photoshop
I have a drawing in illustrator that I want to keep in the exact same dimensions in photoshop. (eg 16mm in ai is 16mm in ps). So I exported from illustrator as a save as web and opened the file in photoshop, but found that I'm unable to edit in the layers panel. Can't even add a new layer. Is there a fix or alternative way to do this?

