How do I apply batch saturation adjustments to images that have already been individually corrected?

[Brendan Foon]

Context I am a school portrait photographer who shoots, edits and prints all of my own photos.

So I have a folder of 1,000+ portrait images. I have corrected them in Lightroom Classic and after beginning to print them I have noticed they are all consistently, slightly too saturated. Is there a way I can remove the same value of saturation (for example -3) to all images - even though they all currently now have slightly different saturation values after their initial edits.

The conventional way of syncing settings across all images won't work as it just increases or decreases images back to a common numerical value, and then gives different results as it also changes exposure, contrast etc. 

[Bob Somrak · Accepted solution]

Go to Library GRID view and select the images.

Hold Option key and Saturation will show up in the Quick Develop Window.

Hold Shift and Option and click the single little left pointer and the Saturation will be reduced for all images by relative -2.  Without holding shift it is reduced by -5.

If you really need -3 you could do a -5 then a plus 2 on Saturation.