In this paper we introduce a set of improvements to Neon, an online square-notation music editor based on the International Image Interoperability Framework (IIIF) and the Music Encoding Initiative (MEI) file format. The enhancements extend the functionality of Neon to the editing of lyrics and single-session editing of entire manuscripts and lyric editing. We describe a scheme for managing and processing the information necessary for visualizing and editing full manuscripts. A method of concurrently editing the position and content of lyrics is also discussed. We expect these will provide a better user experience when correcting the output of automated optical music recognition workflows