NXT has recently (late Feb 2020) changed the functionality of the Attachment Tag field to require users to start manually typing in a tag name before any value options will show up in the field box. Value options  populated are also dependent on the letters typed and a full menu option is no longer available.  Previously, if you clicked on the Attachment Tag field a drop down menu of all Attachment Tag choices would show for the person to choose from.  Now you must type in at least part of what you think the tag is named.  For users that are not in the database very often this will create confusion and make it very easy to tag something inappropriately.