Make the reference yours.

Choose a server address and the thresholds for offline comparisons. Your choices carry across pages.

  1. Server connection

    Leave the address blank to use this website’s server when it is available.

    Checking the server…

  2. Offline comparison thresholds

    These thresholds apply when the server is unavailable. A scan below the suspect threshold matches the reference; larger changes are flagged as suspect or different.