The Impact Thermometer is displayed on the top-right of the dependency graph if the relevant option is selected.

The Impact Thermometer gives you a good idea of where the current item fits in the overall dependency hierarchy of your code-base.

Think of the thermometer representing your code-base.

• The blue region indicates the current item. Its width relative to the full thermometer represents the size of the item. Its location indicates where the item fits in the call tree - e.g. items near the top are more using than used.
• The orange region above the blue indicates the amount of the code-base that uses the current item. The bigger the orange region, the more dependent items. The horizontal line separates the direct users from the indirect users.
• The orange region below the blue indicates the amount of the code-base used by the current item.

This is intended just to give you a sense of context. For example, if you were considering making significant changes to an item low down on the thermometer which is used by most of the code-base - be careful!