You can use the Screens Browser to select (or create) a screen configuration with a single chart panel. (Open the Screens Browser with the second button down on the browser bar.)
Normally this would be the first of the nine configurations which allows you to quickly select a single chart by using the 1 key, but since all nine screens are configurable, that might not be the case on your system.
More info on using the Screens Browser can be found in the help system and we also have a video describing how to use it.