Bug report #14972
Updated by Harrissou Santanna about 5 years ago
Layer Properties dialog, open legend tab. Currently, there's a transparency slider widget available. Add it to the used widget part. You still have a copy of this widget in the "available" part, meaning that you can add as many as you want, which is useless given that there's actually only one slider.
Once added to the used widget, I think it should be removed from the left panel
Once added to the used widget, I think it should be removed from the left panel