I use synoptic to build interactive facility maps, which involves drawing "fields" in an external app, then importing the picture to PowerBI. Unfortunately, visual controls only allow selecting colour to highlight those fields afterwards, but no option to just make them invisible.
It looks much cooler when you just click an object on the picture and the stats change, than having coloured shapes scattered around before you click one, so an option to easily get rid of the colour would be quite useful.
And if anyone knows how to do it right now, please please share!! =)