For those who have used a Lumia device, you might remember the lumia/nokia creative studio where you could edit photos. One of the best features it had was colour pop where you could highlight one or more dominant colours while the rest of the image would be in grayscale - check the example below where the sail has the colours retained while the ocean is gray
Now I wanted to do the same effect but using affinity photo
Is this possible and if yes, how can I do it? A step by step guide would be most helpful.
Thank you