It would be great if it was possible to view only part of the screen of remote PC or tablet. It could be chosen by rectagular selection. In my case the use would be for presentation from tablet, where drawing app would be running, the teamviever client would run on projector side, fullscreen but only drawing part of the tablet screen would be visible. Tool panels on the top or sides would be hidden and the audience couldn't see color or lineweight changing ... I think this shouldn't be a big problem to add something like that to this great application.