The Desaturate submenu contains operations that turn an image into a Grayscale representation, using different methods.
Abschnitt 8.29, „Grau einfärben“
Abschnitt 8.30, „Entsättigen“
Abschnitt 8.24, „Mono-Mischer“
Abschnitt 8.32, „Sepia“
You can access this command from the main menu through Colors → Desaturate.
