You can convert one ore more pages to grayscale.
For example, the document contains images with a [Color space] other than [RGB], [CMYK] or [Grayscale]. You cannot edit these images. When you convert the pages with the images to grayscale, you can also edit the images.
Color images can be converted to grayscale images. Grayscale images are also known as black-and-white images. Such images are composed exclusively of shades of gray, varying from black at the lowest intensity to white at the highest.
Select one or more pages.
The file may contain a mix of CMYK, RGB, or spot color objects.
Click [Pages] - [Convert to grayscale].
The selected pages are converted to grayscale.