Remove Login Name: from Preferences under Identity

Hello All,

I want to change the Login Name: under Edit-Preferences-Identity. I want to change this field so it is blank. I have the box un-checked that says "Always use Login-name for Author name. I do not want an author on my documents. I just want to get rid of the name in Login Name: and have it blank. I do Pdf's for a scrapbooking group and prefer not to have my name all over the internet.

Thanks Karen