Working with channels - affinity Photo 2

[Thomahawk]

Using Affinity photo 2 on Mac monterey

trying to edit a color channel of a cmyk photo. Can not find the edit buttons (pencil icon) like described in the help documentation. I only see some kind of slider icon. With that activated, I can paint on the channel.

But what I need is copy paste portions of the channel. How can I do that?

[Lisbon]

Hi @Thomahawk

On 1/7/2023 at 10:25 AM, Thomahawk said:

Can not find the edit buttons (pencil icon) like described in the help documentation.

Probably you're reading the version 1 help manual.
Since the icons are different I imagine that new features have been added to that "Editable" icon. It is possible that the process I am going to describe has become simpler in version 2.

On 1/7/2023 at 10:25 AM, Thomahawk said:

But what I need is copy paste portions of the channel. How can I do that?

In version 1 this is how I would do it.
In this example i will edit the Magenta channel... on the layers tab.

1) Duplicate background (BG Copy)
2) Visualize just the magenta channel by clicking the text "Composite Magenta" on the Channels tab. In your case "Verbund-Magenta".
3) Edit "BG Copy" layer with all the copy/paste required. After pasting i advice to merge (Ctrl+E) with "BG Copy".
4) Create a spare channel by right clicking "Composite Magenta" on the Channels tab
5) Delete "BG Copy"
6) Replace Spare channel by Magenta channel (Right click Spare channel and choose "Load to ??? Magenta". Hintergrund Magenta in your case)

Don't forget to reset the channels tab (circular arrow in the upper right corner of the channels tab).

[NotMyFault]

On 1/7/2023 at 11:25 AM, Thomahawk said:

But what I need is copy paste portions of the channel. How can I do that?

 

What do you intend by „portions“:

1. copy one color channel and paste it into a different color channel of the same layer
2. copy one color channel and paste it a color channel of a different layer
3. opt 1, but only the area of and active pixel selection
4. opt 2, but only the area of an active pixel selection