More than one turtle can occupy a single patch at any given time. The blue patch below would look like it had only a yellow turtle on top of it, even though many turtles are sitting underneath that yellow turtle. There is virtually no limit to the number of turtles that can sit on the same patch. The Starlogo Graphics Window is shown below. You can change the size of the graphics window if you wish.
Explorations Try moving the turtles around the graphics window.
You can type commands directly into the command center. They might be bigger or smaller than the typical window above.