keeping an eye on things as a GM (seeing the player experience)

GM mode gives me a different view than the player - for example, fog of war. But I'd like to have a window open that does give me the player view. Can I create a 'ghost' player, or should I just create a ... pet cat that follows them around so I can have a "PC" open in a second window. 

Well, you can select a token and press Ctrl+L, that will make you see though its eyes until you click the map again.

Note that sometimes Ctrl-L does not give a true view of what the player sees, but it can be good enough in most situations. I believe Ctrl-L only shows what the token sees based on its own light source but not external light sources. So, if another token is emitting light (say, another character carrying a torch), the player will see the area covered by the torch's light, but Ctrl-L will not.

If you haven't looked at the sticky post at the top of this forum titled "Stupid Roll20 Tricks", you should check it out.&nbsp; The first post is an index.&nbsp; One of the ideas there is a dummy account, so that you know exactly what players are seeing.&nbsp; <a href="https://app.roll20.net/forum/permalink/6049241/" rel="nofollow">https://app.roll20.net/forum/permalink/6049241/</a>