The tool highlights new processes, stopped processes, and other process types in various colors; you can configure the duration of the highlighting via the Options menu. Additionally, let's say you want to find the process for a certain application that's running. Click the "target" icon (the right most icon next to the binoculars) and drag it over the window of the application whose process you want to find and its process will then be highlighted. Take time to investigate all the tool's options because it provides huge amounts of information about processes and the system in general.