Customize histogram in the legend

[anjelinejeline]

Is it possible to modify the x and y axis of the histogram in the legend? as well as separte it from the colour scale when defining the legend position?
I found this old post but I am not sure whether the new version of tmap allows such things now

[mtennekes]

It should be possible in v4. Check out #843. If you have concrete use-cases (with examples) that you would like to have, let us know.