A system for editing digital documents on computing devices is provided. Each computing device comprises a processor and at least one non-transitory computer readable medium for recognizing handwriting input under control of the processor. The at least one non-transitory computer readable medium is configured to cause display of, on a display interface of a computing device, first digital ink in accordance with document content, detect handwriting input as one or more editing gestures with respect to the document content, and cause display of, on the display interface, second digital ink in accordance with handwriting input.