From most windows and functions, clicking the '?' button will open a standard Apple HelpBook window with topic-specific information.
Use the 'Preferences' option in the LabHelper menu to adjust default settings (change screen colors with 'colors and lines' in the VIEW menu). Clicking the 'save current preferences' button stores your custom settings so they are used automatically the next time the program is launched.
On these pages the symbol indicates
use of the command key for keyboard control. For example, O means "command+O".