The Console Window
The Console window acts as the main window for Grace: there is only one Console window and closing it will quit the application. The purpose of the Console is to serve as standard output for Lisp and to display any messages, errors or warnings that result from your work.
The appearance of the Console can be customized by changing its font size and selecting color themes for the window. A number of different themes are available under the
submenu. In general, a theme controls the Console's background color and the color of normal output text. A few special types of messages have a consistent appearance across all themes:- Error messages (red)
- Warnings (orange)
- Return values (green)