What’s new in CotEditor 5.1 on Mac

Easier to distinguish documents
A parent folder name appears in the window title for documents with the same filename.
Read-Only Mode
Prevent accidental editing by making documents read-only from the Format > Prevent Editing command or the cot command-line tool.
Display Finder Tags
Displaying Finder tags to the document inspector and the file browser ensures consistent document organization.

See also