man pages section 3: Curses Library Functions
    
O
 
 openpl - graphics interface ( Index Term Link )
 
 openvt - graphics interface ( Index Term Link )
 
 output attributes to the terminal - vidattr ( Index Term Link )
 
 output attributes to the terminal - vid_attr ( Index Term Link )
 
 output attributes to the terminal - vidputs ( Index Term Link )
 
 output attributes to the terminal - vid_puts ( Index Term Link )
 
 overlay - copy overlapped windows ( Index Term Link )
 
 overlay or overwrite any portion of window - copywin ( Index Term Link )
 
 overwrite - copy overlapped windows ( Index Term Link )