HSL adjustment hue shift bar

[alecspra]

Hi, in the HSL Adjustment what is the function of the color spectrum bar above the Hue shift slider? Can you do something with it. I noticed that it does not change no matter what I do with the hue shift bar below it. Is it there just for reference? Thanks!

[Affinity Jack]

Hello alecspra,

 

I don't know exactly what you mean.

The reasons for effecting nothing could be:

- it is only a black & White layer (Colors are needed)

- the selection isn't correct

- the effected layer isn't active

 

Or you mean, that there are 2 slide bars.

Yes, the upper one has no function.

 

In this tutorial I use the HSL-adjustment:

https://youtu.be/fFOjBzKQ1Wo

 

Ciao Jack

[R C-R]

From the Affinity Photo Help topic HSL Adjustment:

 

Why two spectrums for Hue Shift?

 

The upper spectrum represents pixel colours in the original image, using cyan as a mid-point. This spectrum is not a slider and cannot be adjusted.

 

The upper spectrum is a reference for the colour shift of image pixels when the lower slider is adjusted. Before adjustment, the spectrums are identical.

 

If, for example, you drag the slider to the right the green section of the lower spectrum will soon lie under the cyan mid-point. All cyan pixels in the image will now appear green. All other pixels in the image will all shift to an equal degree, e.g. blue will become cyan, and green will become orange.

 

[Affinity Jack]

Hi R C-R,

 

thank you.

I'm always learning in this Forum with the excellent "Affinity Familiy".

:lol:

Ciao Jack

[alecspra]

Thank you Jack and RC-R. The explanation about the function of the upper hue bar really helps understand how to use the hue slider.  

[R C-R]

There is a lot of useful info in the Affinity Photo (& Designer) Help ... it isn't always as easy to find as one might like, but just about everything is covered in some detail.

 

Another nice thing about it is it is provided in multiple languages so you don't have to struggle to understand it if English is not your native tongue.