The Change Heatsink dialog box allows you to select a heatsink in the library to replace the one that was automatically selected by PI Expert.
Use the Fields button to open the Select Fields dialog box and customize the set of the heatsink parameters that are displayed in the Change Heatsink dialog box.
To change the heatsink, select the desired heatsink in the list and click OK.
See Component Library, Component Sets and Heatsinks Library for more information.