Looking back at some past flight tickets, I see for a trip with 1 layover, I was given a boarding pass for the first leg, and a transfer pass for the second leg. The pass type was indicated on the boarding and transfer passes. Both the boarding and the transfer passes mention the seat number as well as the boarding time.
What's the difference between a transfer pass and a boarding pass? E.g., does a transfer pass not allow me to leave/re-enter the airport during the layover?
Example of transfer and boarding passes:
The transfer pass looks the same as the boarding pass, the only difference being that it says transfer pass at the top right corner instead of boarding pass.
More information: single ticket, transit pass issued at the departure airport at the same time as the boarding pass, didn't pass immigration during layover, no visa required at layover. leave the airport" = exit the airport's secure area