Each email is listed on its own line in the items list, and each email retains the information about its sender, time recieved, attachments, etc.
In order to search through this (possibly huge) file please use the Search box in the upper righthand corner of the PDF:
By selecting the dropdown arrow on the right side of the search the option to Search Entire Portfolio can be selected if searching the individual email is not the search needing to be performed.
To extract one of these files and attach to a new email please select the Floppy Disk icon and choose Save File from Portfolio
Now this file can be copied from and pasted into an email or attached to an email for reference back to the original email exchange.