To compare two call stacks
  1. Open at least two snapshots or two tabs of the same snapshot.
  2. Choose a function call to be compared.
  3. On the menu bar, choose File | Compare Snapshots or click ico_compare on the toolbar. The Choose Tab to Compare drop-down list appears. The list contains names of tabs of all opened snapshots grouped by snapshots.
  4. Click an item from the drop-down list.