Choose levels for the contours in the contour plot

[nl78]

Thanks for your answer.

I find a way. I took the log(z array) and changed values show on the color bar to put exponential of previous log values.

I just find a way to print the hover values below the contour map.

Is it possible to change directly the text in hover box generates by plot.ly ?

The new contour map : https://codepen.io/nl78/pen/NYxoyp

Thanks for your time