After installing and configuring XFree86, you notice that when you start X, the display is not
centered. What program can you run to find a better modeline setting?

A.
XF86Setup

B.
xf86config

C.
xvidtune

D.
xvideoagent

Explanation:
xvidtunE. video mode tuner for XFree86.
Synopsis: xvidtune [ – show | -prev | -next | -unlock ] [ -toolkitoption … ]