A resolution of {HEAD ~ the screen} to be displayed thereon is firstly decided, and a screen mode suitable to {TAIL ~ the screen resolution} is set 
A resolution of { HEAD ~ the screen } to be displayed thereon is firstly decided , and a screen mode suitable to { TAIL ~ the screen resolution } is set
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH