Thank you, Ofnuts.
Another difficulty of adaptation relates to the colorize function in the color menu. In GIMP 2.8 I would type a color code and it would stay alive until I changed the code. This allowed me to make tonal adjustments and observe the effect on the image until I decided on the best option. In GIMP 2.10 the color is always 40bfbf and every time I experiment with my chosen color and I want to adjust hue, I need to enter the code again ...
Another difficulty of adaptation relates to the colorize function in the color menu. In GIMP 2.8 I would type a color code and it would stay alive until I changed the code. This allowed me to make tonal adjustments and observe the effect on the image until I decided on the best option. In GIMP 2.10 the color is always 40bfbf and every time I experiment with my chosen color and I want to adjust hue, I need to enter the code again ...