Hi, I would like Photo to allow me to implement the method given in https://dmacphoto.wordpress.com/finding-neutral-grey/ (among other places) for accurately finding neutral gray pixels. I don’t think it can be done now (v1.5). It requires: (1) a method of creating a pixel marker within a threshold adjustment layer that will remain selected/marked after the threshold adjustment layer is deleted; and (2) a method of setting the gray point in a curve adjustment layer using a mid-tone eyedropper (which I guess is sometimes called a pipette?) with the same pixel marker that was selected in #1, above. This method is very reliable - much more reliable than guessing about a neutral gray pixel in the white balance tool. TTBOMK, neither the persistent marker nor the gray point pipette exist now. Thanks.