glutFullScreen man page
glutFullScreen — Resize the current window to cover the entire screen
OpenGLUT - window
The glutFullScreen() function resizes the window to cover the entire screen and hide window decorations such as title bars and icons.
The desktop resolution is not affected by a call to glutReshapeWindow() or glutFullScreen().
The size of windows is ultimately determined by the windowing system. Therefore, a fullscreen request by an OpenGLUT application may not necessarily succeed or take immediate effect.
Not applicable to offscreen or subwindows.
glutInit(3) glutInitWindowPosition(3) glutInitWindowSize(3) glutGet(3) glutPositionWindow(3) glutReshapeWindow(3)
Explore man page connections for glutFullScreen(3).