Use of the histogram in "Envisage" (Continuation)

The image being very over-exposed since the last adjustment, it is necessary to decrease the exposure time. Here it is brought back to 0.0010.
The image begin to be presentable... but the colors are again strange.

Note the modification of the histogram...

Let us take again the command "Color" and at this time let us click on "Auto".

The histogram moved very few but the color became more "natural".

At this stage it is interesting to modify the "Gain".
The target is to widen the histogram to the maximum towards the right (as wide as possible in fact). Concretely we widen the scale of luminosity. We can follow this effect by observing the values at the lower part of the histogram (here 1931/43955).