In the Import Session Data dialog, you can specify where the imported tracks are placed in the current session. Times are indicated in timecode.
This option places tracks at the locations where they were located in the source session. For example, if the current session starts at 00:01:00:00, and the session from which you are importing starts at 10:00:00:00, the earliest imported tracks can appear in your session is 9 hours and 59 minutes after the start of the session.
This option places tracks at the same offset from session start as they had in the source session. For example, if the source session starts at 01:00:00:00 and contains a track that starts at 01:01:00:00, and the current session start is 02:00:00:00, the track will be placed at 02:01:00:00 in the current session.
This option places tracks relative to their original session start time. (Times are expressed in hh:mm:ss:ff) For example, if the current session starts at 00:01:00:00, and the session from which you are importing starts at 10:00:00:00, you can reset the start timecode to 00:01:00:00, to avoid placing files 9 hours and 59 minutes from the start of your session.
When selected, the Adjust Session Start Time to Match Source Start Time option lets you automatically set the start time of the current Pro Tools session to match the start time of the session, or AAF or OMF sequence you are importing.