When you start Quartus Forth, you are presented with a welcome screen and a blinking cursor. This is where the Forth system accepts instructions. Each input line must be terminated by a Graffiti <Return>, which is a single stylus-stroke from upper-right to lower-left in the Graffiti area.
If you press the Menu silkscreen button, you'll see the Quartus Forth main menu.
This menu presents four pulldowns: Program, Edit, Go, and Options:
Under Program:
Edit provides standard Palm OS editing functions for the input line.
Go has one menu option: Last Error, which will take you to the Memo Pad app and highlight the exact place that the last error occurred while compiling your code.
Options has one menu option: About, which displays the Quartus Forth "About Box".