There isn't a way to separate editing of the Bio & Info tab from the ability to edit the Attributes & Abilities tab (the character sheet tab is basically a fancy UI for the latter). There are a few ways to handle this that I have used, and usually do a combination of 2 and 3 in my games. 1. You do the work of putting the notes in the Bio & Info tab that gives reminders to the players of what they have heard/experienced with this npc. Of course, you have a different perspective as the GM, so may not (if you don't have good input from players) get the exact info on there that the players would choose themselves. You could work this much like 3, except that you don't have the option of turning over control to a player without exposing the sheet. 2. Assign a handout to each player to use as a journal. Create one as a group journal that all players can edit and let them take notes or not as they will with those. Of course, they may not take notes, in which case you have to figure out what to do about that. 3. Create a handout (with portrait) for each npc important enough to warrant notes. Put in whatever info the players will know at the beginning, and keeping anything they don't know in the GM notes section for easy copy/paste later as they learn more. You can then turn edit permissions over to the players of this handout, or to a certain player that has volunteered to take care of that sort of thing. Hope you find a system that works for you.
