Hi, Do you mean to ask how you can see the chats you have had with people in the past on FB? If that is what you want to know, you would have to be upgraded to the new FB message system. Under that system, all of the messages and chats you have had with a person are grouped together so they are easy to find. If you are not on the new system, a friend can send you an invite to upgrade, and then you have to wait for FB to send you the notice that you can upgrade to the new system. I hope this helps. If not, please let me know and I will try my best. Have a good day
If you mean messages (the email feature) then just use the search feature irrespective of whether you have upgraded or not. If you are referring to actual chat (the IM feature) then you can't