Yes. This can be done while you are connected to a particular ECU or after you have disconnected.
Q: How do I print a snapshot to a PDF while connected to the vehicle?
A: Go into a particular ECU, then click snapshot and 'PRINT TO PDF'
Q: How do I print a snapshot to a PDF from a past connected vehicle?
A: Go to the vehicle information' tab within MECH5. Find the vehicle you require the snapshot from then click 'PRINT TO PDF'
Particular ECU Snapshot Report Example: