Just use quotes.
For instance, if you want to display a smiley face instead of "Done", just do:
If this is the last line of your program, this will be displayed instead of done.
You don't need to use output.
If you want to just get rid of "Done", use a single quote as the last line of your program, like this:
You could also add a space afterwards.
Unfortunately, this creates an empty line instead of having the blinking cursor directly underneath the program name of the program that was just executed.
One cool peculiarity:
If you are on the graph screen and you have stuff drawn on the graph screen, and then you exit the program, and your last line is:
Then whatever was on the graph screen gets transferred to the home screen.
You can't have ClrHome before the " though.
Do a few math problems before hand, or run it 4 or 5 times in a row.
In other words, you want the program to be executed at the bottom of the screen. That makes it cooler, because then you can enter math, like "3+3" and it gets shifted up line by line.