--tv-geometry=WIDTHxHEIGHT{+|-}X{+|-}Y
              =WIDTHxHEIGHT
         Change the size and position of the TVout display. 
         WIDTH and HEIGHT are in percentage units. Please note
         that the valid range for WIDTH and HEIGHT depends on
         the tv-format selected. However, as a rule of thumb  
         WIDTH and HEIGHT are valid in the range [1,100]  
         X and Y are pixels offsets from centre 
         of the screen. X and Y are have variable ranges dependant 
         on ASIC. Use tv-info to get valid X and Y ranges 
         If tv-geometry is invoked with just width and height 
         then X and Y are assumed to be 0
         See example 5 below for a sample usage.