T-PEN (Transcription for Paleographical and Editorial Notation) seeks to address both the accessibility and usability of digital repositories. Developed by the Center for Digital Theology of Saint Louis University, in collaboration with the Carolingian Canon Law Project of the University of Kentucky, this new digital tool is a sophisticated web-based application that assists scholars in transcribing these manuscripts. To reduce the likelihood of transcription errors, we took advantage of digital technology to place both the transcription and the exemplar in a manner that minimized the visual movement between the two as much as possible. We accomplished this with a simple but novel visualization of the lines of script in the exemplar, which we integrated with interactive transcription spaces. To build the tool, we developed an algorithm for “parsing” the lines of script in an image, and a data model that connected the image delivery of manuscript repositories with the actions of transcribers.