Suggestion - The slide bar for the layer transparencies could be visible at all times rather than having to toggle it on and off. It doesn’t seem to take up an extra space so I don’t see the purpose in turning it off? the label could be placed elsewhere when you hover over it maybe? Is there a thought that the system button will do something else as well? If so it can stay the way it is, but I’m not aware at this stage of another reason for the system (cog) button?