Documentation only: picker in curves adjustment

[NotMyFault]

Hi,

 

the current documentation lacks improtant detals about the color picker in curves adjustmnent.

It should say that only the luminostity value of the picked pixel will be used. Please add some more dteails:

1. size of color picker (1x1, 3x3, something else?
2. Color format used for lightness calculation - Always RGB/HSL or is it adapted to the color format (e.g. LAB, CMYK) of the document or the color model of the curves adjustment?

https://affinity.help/photo2/en-US.lproj/pages/Adjustments/adjustment_curves.html

current:

Picker—click to activate the picker which allows you to drag on the image to modify the adjustment. Initially, a click-drag places a node on the curve in relation to the pixel selected. Secondly, dragging up (to lighten the image) or dragging down (to darken it) modifies the adjustment. The curve graph will update accordingly.

Recommended:

Picker—click to activate the picker which allows you to drag on the image to modify the adjustment. Initially, a click-drag places a node on the curve in relation to the lightness value of the pixel selected - no matter which color channel you have selected. Secondly, dragging up (to lighten the image) or dragging down (to darken it) modifies the adjustment. The curve graph will update accordingly.

[insert one of the 3 sentences which is correct, or expalin what actually happens if none of those fit.]

• The lightness values if calculated in RGB/HSL color model, unrelated to the color model of the document or the adjustmet layer
• The lightness values if calculated in the color model of the document 
• The lightness values if calculated in the color model of the adjustment layer

The picker considers an area of 1x1 pixel.

 

 

 

Recent assumed bugs due to insufficient documentation:

 

 

[NathanC]

Hi @NotMyFault,

Thanks for reporting and providing your recommended amendments, I've now reported this over to the docs team for review, and also requested clarification on how the luminosity value is calculated as a part of the picker.