There were already a couple of tools in this space for folks to contrast/compare: inftyeditor: https://www.inftyproject.org/en/software.html https://www.inftyp

There were already a couple of tools in this space for folks to contrast/compare: inftyeditor: https://www.inftyproject.org/en/software.html https://www.inftyproject.org/en/software.html ffes: https://www.cs.rit.edu/~rlaz/ffes/ https://www.cs.rit.edu/~rlaz/ffes/ TeXview.app had an option to enter a single character using a graphics tablet or mouse which worked quite well (and allowed me to type up notes for a college professor).