Synchronization and MachineControl system settings are enabled in the Pro Tools Peripherals dialog (
Setup > Peripherals). These settings are
system settings, and remain constant regardless of the particular session you are working on. Configure these settings before opening a session.
Other settings are configured in the Session Setup window, such as the session Timecode rate, the Feet+Frames rate, the session start frame, and time display format. These settings are
session-specific settings. These settings can only be configured when a session is open.