How to clear a screen

[KarelPostulart]

Hi,

I wrote a program printing rows of numbers. When I ran the program again, the old results were still there and the new ones were printed after the old results.
I am used to the TI-89, where I can clear the I/O screen. I cannot find an equivalent command in the catalog. Maybe it has a very unusual name I don't know. Can you help me out here?

With best regards