If you have "expert access" privileges on INTF's VMR, you can use your username (not email!) and password to unlock protected images for viewing here in the Underground. You should not normally enter security credentials from one site into another. The credentials you enter into this form are are submitted with every request to INTF's server for images (every time you click "images"). They are not stored longer than a single "click" at a time, and they are never written to disk. Still, don't put your password into this form unless you know and trust me.

Note that all fields in the form are submitted to INTF's API. Only manuscripts that match all of the input fields will be returned. If you are retrieving a single manscript by its GA number, leave the other fields blank. If you want all manuscripts from a country, leave the other fields blank. You get the idea.