New annotations are created by subtracting annotations from annotations on other tiers. This function can be started from Tier > Create Annotations from Subtraction…. This will open the Create Annotations From Subtraction window that is based on 4 steps.

  1. Step 1/4: File and Tier Selection ( see Create annotations from overlaps)
  2. Step 2/4: Subtract Computation Criteria

    In this step you can choose the subtraction computation criteria in the Subtract computation criteria window

    Figure 2.123. Subtract Computation Criteria

    Subtract Computation Criteria

    You can choose one of the following: Click on the
    icon to know more about the differences between the above mentioned options.

  3. Step 3/4: Destination Tier Name Specification (see Destination Tier Name Specification)
  4. Step 4/4: Destination Tier Value Specification

    Here you can specify the value for the destination tier.

    Figure 2.124. Destination Tier Value Specification

    Destination Tier Value Specification

    For detailed explanation on the options see Destination Tier Value Specification.

    Finally, you can click on Finish. The new tier will be created and populated.