This feature would replace all the applications that do hex editing, like HxD etc.), so one doesn’t need anymore to install them.
On F4 on binary files, allow editing by placing the cursor on both hex and text windows, then saving in the usual way.
MarcoCecchi EDIT: not ASCII encoded, but if it contains only quote-printable chars. If it does, it can be opened as a text file.
This is NOT an urgent issue