The "Trace Under Component" option allows you to check, if certain components have unallowed copper tracks under their body between their pins. This is mostly unwanted for small 2-pin components, as it can cause problems during soldering.
In the first block (1) there are different options to identify the components that should be analyzed:
With the block "Keepout Area Definition" (3), you can enter the wanted undersize that is used to determine the keepout area under the component body and between its pins.
The results of the analysis are displayed in the window on the right (4). You can also view the analysis results directly in the tool. Critical errors can also be marked for later use (e.g. in the 'Extended Design Report').
Following picture shows an example error of this analysis:
The component "r808" has unwanted copper tracks under its body inside the keepout area.
The following functionalities are equally integrated in all six options: