ocr: Level of Difficulty Click Scroll Arrows one of these buttons to choose your level of difficulty. Speaker Switch - Click the speaker to turn the computer voice on or off. Options Button - Click this button to access the Glossary; go to the main screen; turn the background sound / music on or off; or quit program. Main Button - Click this button to return to the main screen. Exercises Button - Click this button to try the exercises for the current lesson.
