What exactly to you mean by "editor"? If you are asking about a tutorial that explains how to use the Roll20 VTT (Virtual Table Top) you can find some help here: <a href="https://help.roll20.net/hc/en-us/categories/360003756533-Getting-Started" rel="nofollow">https://help.roll20.net/hc/en-us/categories/360003756533-Getting-Started</a> There are also some videos on Rol20's YouTube channel: <a href="https://www.youtube.com/watch?v=ueflwPxQTRc&list=PLTj75n3v9eTnHXIZizD0EIDsPy_s-48YL" rel="nofollow">https://www.youtube.com/watch?v=ueflwPxQTRc&list=PLTj75n3v9eTnHXIZizD0EIDsPy_s-48YL</a> As well as other instructional videos by others, though many of them are a bit dated.