The Desaturate submenu contains operations that turn an image into a Grayscale representation, using different methods.
Одељак 8.29, „Color to Gray“
Одељак 8.30, „Desaturate“
Одељак 8.24, „Mono Mixer“
Одељак 8.32, „Sepia“
You can access this submenu from the main menu through Colors → Desaturate.