On Sun, 15 Nov 2015 08:21:49 -0500, Wolf K wrote:

Irfanview displays the complete image by default. Check the info-bar at
the bottom of the screen, you should see less than 100% when you display
an oversize image. Use the +/- zoom button on the toolbar to change the
displayed size.

BTW, don't fiddle with the resolution setting. You can use Windows
Personalize to increase the sizes of fonts in labels, menus, etc, and
desktop icon size.

Thanks for posting. I know how to use Irfanview settings, and I have
set "Fit to screen (large images only)". I've no reason to think this
was an Irfanview problem.

My point was that that's how I know that Irfanview was seeing the
screen size as 1280x720 even though the resolution was set to the
recommended 1920x1080.

As you know, it's possible to display Irfanview's zoom percentage in
fullscreen. Anything larger than a 1280x720 image showed a zoom less
than 100%, indicating Irfanview thought it was too big for the
screen.

I didn't mention earlier, but what initially twigged me to the
problem was that I have a lot of local Web pages with images 1550
pixels wide. Firefox was displaying only part of all of them, with
horizontal scroll bars. I knew that couldn't be right, on a display
with 1920 horizontal resolution.

For Firefox, there's a setting layout.css.devPixelsPerPx in
about:config. I've been experimenting with that, but the final
setting will depend on whether I keep Windows DPI size at 125%
(Thanks, Paul!) or go back to the default 150%.

--
Stan Brown, Oak Road Systems, Tompkins County, New York, USA
http://BrownMath.com/
http://OakRoadSystems.com/
Shikata ga nai...