Combine Values mode

A small advanced feature went live today. When you have picked a value scale, you can now combine adjacent values to see how the image looks at a coarser grouping, without changing the underlying scale.

This is useful for example in situations where you want 3 values but you want to see more mid-tones than lights and darks. You can use it by toggling the combine values on then selecting the two values you want to combine.

Update 2026: I've decided to remove this feature. Since adding it, I've added the Histogram tool. This is far more powerful at customising the value ranges. So the Combine Values tool can instead be replicated by adjusting the width of the range of a value in histogram.