When you have finished processing the document, click on the checkmark. If you are not sure what to do with this document and you want to check first with your colleague or manager, click on the parking sign. This allows you to take the next document in the queue for now and to come back later by filtering on 'parked by users'. If the document is not treatable, click on the cross. Afterwards, the next document will be selected automatically. If it was the last document, you will be asked to submit it and the next manual intervention item will be started.