XFree86 Video Timings HOWTO
: Fixing Problems with the Image.
: The image is too wide (too narrow) horizontally
Previous: The image is too large both horizontally and vertically
Next: The image is too deep (too shallow) vertically
14.4. The image is too wide (too narrow) horizontally
To fix this, increase (decrease) the horizontal frame length. That is, change
the fourth number in the first timing section. To avoid moving the image, also
move the sync pulse (second and third numbers) half as far, to keep it in the
same relative position.
XFree86 Video Timings HOWTO
: Fixing Problems with the Image.
: The image is too wide (too narrow) horizontally
Previous: The image is too large both horizontally and vertically
Next: The image is too deep (too shallow) vertically