Not able to figure out how to change ColorKeyColor in Pipeline Tool

Been trying to look around and can’t find anything when searching “ColorKeyColor”. I am not able to change the property of a .png file I have added and any fiddling around so far has not yielded anything productive. To elaborate, while viewing the file from the Monogame Pipeline Tool properties, the ColorKeyColor field is greyed out and unable to be edited. Am I missing something I need to do in order to change this?

I am getting around this problem at the moment by just going in and creating an alpha channel however I am still interested in knowing why I can’t change the Color Key value if anyone has the answer to that.