Hello, I have a very slight problem with the Materials Tray (see attached image). I created a new siding material (the one with blue highlight around it) in the top tray. I cannot seem to drag n’ drop it into the lower tray (currently showing my brick, cladding & siding textures). When I drag the texture from the top tray, it will not appear in the lower tray. I watched a YouTube vid where the guy was able to do this, so I’m a bit perplexed as to why I can’t repeat his steps. Any suggestions?
(The attached image may appear collapsed here, please click on it to expand it to see both trays.)