In the Java distribution you should find a file called `samples.dir'.
This is just a regular directory which you can download to your HP48.
It demonstrates what AGROB and the scroller are capable of.
Simply transfer it to your HP, store it in a variable, and enter the
directory. Make sure Java is running and that on-stack algebraics aren't
disabled in STK. Then just press any variable name in the menu in order
to see the object in it.
If you notice an equation extends either off the right or top of the display,
you can enter the scroller with RS-Picture (RS-Graph on S/SX) and
use the arrow keys to move around. Similarly, to view lists of numbers in a
more intuitive format, you can also use the scroller.