Please forgive my newbie question. I am still learning my way around. I've downloaded the developer version of the Web AppBuilder and installed it on my machine. I also was able to add a widget to AppBuilder. Now I would like to be able to modify the code in order to add a loading image over the map area and remove it once the map is ready. I found looking at the DOJO tutorials a possible solution but I am not sure were the CSS or code to change. Can someone point me to where or what files need to change? I thought it may work in the Layer list widget on show Layers but don’t know if this is where I need to make the change.
Thanks in advance.