Sorry to bother you,
but maybe someone can help me.

I'm trying to get used to Krita after being a Photoshopuser for some years and so far I'm quite pleased.
But what I'm really missing is the "channel mixer" tool since I'm sketching on paper with red or blue colored pencils and also do the inking on the sketch. To continue to work with the picture I have to delete the color after scanning, but how can I do that in Krita?
In Photoshop I have used the "Channel Mixer"
-https://pario.no/wp-content/uploads/2008/06/photoshop_channel_mixer.jpg
-http://www.all-things-photography.com/wp-content/uploads/2013/12/channel-mixer-show.jpg

But it seems to me like this tool/filter doesn't exist in Krita.
Am I missing something? Is there another solution in Krita?

Can anyone of you help me?
Thank you very much for your help in advance.

No, there isn't, but you could try to follow this: http://www.davidrevoy.com/article239/cl ... h-in-krita ?

Thank you very much TheraHedwig, this was really helpfull!