Lines Draws lines on screen using previously set foreground color. Text Draws text on screen using previously set foreground color. Draw Boxes Draws boxes on screen using previously set foreground color. Move Area Moves or copies an area of the screen from one position to another. Useful also for editing labels, etc. for photography.
Volume is viewed along X axis.
Surface view is same as surface operation. Mouse buttons control movement of a tool which drills or fills areas of the volume. INFO X info Prints some debugging information in terminal window. Manual Shows manual in a window. File searches begin from here.