There are a number of different ways to remove colour, however these are probably the most common ways:1) Go to Document Colour Format Greyscale. There should be an option in 'effect' to convert into grayscale/black&white in Designer. There is just too many steps to achieve that right now.Designer Layer New Adjustment Black and White (Ctrl + Shift + Alt + B)Photo Layer New Adjustment Layer Black & White Adjustment (Ctrl + Shift + Alt + B)are both one step processes, with keyboard shortcuts.You even get the option to adjust the conversion, if you want. Or not, if you don't want the extra step of dragging a slider to improve the conversion.
When you use a PDF writing program to create a PDF file. Are readily available, many free programs may be used for creating grayscale PDF files. “Print” and click the “Print Preview” button, which will open a separate dialogue window. You can apply Color Filters to the computer screen, by enabling Invert, Grayscale Inverted, Deuteranopia, Protanopia, Tritanopia filters on Windows 10. This post explains how to use the color filters.