worknc_training_guide_cad_surface_basic

http://www.cadfamily.com/a/CAM_CNC_DNC/WorkNC/worknc-training-guide-cad-surface-basic_9751.html

HIDDEN LINE
This icon allows you to switch the display of the part in the active window into a wireframe representation
of the part but without showing the U and V ISO parameter lines of the surfaces and without the corresponding
colors. Hidden lines are not visible. This may be useful for making a screenshot of the part.
SHADED WITHOUT SURFACE BOUNDARIES
According to the current OpenGL Parameter settings, this icon switches either to a shaded display
without surface boundaries and/or to the display of the surface tessellation if this option is active in the
OpenGL Parameters.
OPENGL SHADED + WIREFRAME
This icon allows you to switch to OpenGL Shaded + Wireframe mode in the active window. When you
click on this button for the first time, the shaded OpenGL display is calculated. This calculation may take
several seconds or minutes depending on the complexity of the drawing and the computer processor.