You can run a report to find unsigned encounters as well as encounters that have not been completed yet. Go to Scheduling> Scheduling reports (top right side of your screen). Then click ‘Encounter’ on the far left side of your screen. You screen should look like this:

From here you can choose the appropriate location, provider,  date range, status, and approval. In my example above, I left the status at ‘any’ and the approval at ‘either’. If you want to see unsigned encounters, you will set the approval to ‘not approved’ which means unsigned. If you want to seems exams that have not been completed yet, you will set status to ‘in progress’.