This demo focuses on the comprehensive reimplementation of OCR4all, a fully open-source software for Automatic Text Recognition (ATR). Its goal is to allow even non-technical users to process challenging historical manuscripts and printings completely independently and in great quality. Other than comparable tools OCR4all focuses on incorporating many freely available ATR tools and combining them into a workflow specifically suited to the individual needs of different users and use-cases. During the demo we will showcase the many functionalities of OCR4all including defining, applying, and comparing workflows and their generated results as well as data management, training, evaluation, and project management in a collaborative working environment.