--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.