Working CMYK or Document CMYK, what are the difference for color output in InDesign?
Could you explain what are the differences in these two and which one should be used for files to be sent to press?
I wasn't able to find any good answer to this question.
Document Color is the color mode that your document will be output to when exported for print.
Working CMYK is the CMYK values you are using within your working document. So if your document were RGB, but you wanted to make a color based off of CMYK color values, they would be working CMYK values.
So a CMYK document might look normal on your screen but weird on the web, and vice versa. That kind of thing.