You can match a clip on the Desktop or timeline with its source clip. There are numerous options to match clips with their sources, depending on the result you are trying to achieve. You can select any or all of the following from the contextual Match options on a desktop or timeline clip:
Once you have selected the match criteria from the list above, you can select Match or Match All.
The matched source is selected in the Media panel, and is displayed in the thumbnails view at the appropriate frame.