Bad link between the "Color Legend Visibility" buttons of the toolbar and the Color Map Editor.
This issue was created automatically from an original Mantis Issue. Further discussion may take place here.
The current state of the "Color Legend Visibility" toggle button in the toolbar is not correctly reported to the one available in the "Color Map Editor" (while the reverse works). In consequence, the "Edit color legend properties" button may be disabled if you don't toggle its neighbor toggle button first to hide/(re)show the color legend.