sam ende wrote:
how do you re-size png's to a smaller file size best in gimp, (i don't
understand the window that comes up; it's differnt to the jpeg window
resize window) --there is a slider for compression and other options
but i don't know what they mean
The compression level is a balance of CPU time to file size. The format
is lossless whatever ratio you select, so the image will not be altered
at all. The level just tells teh encoder how hard to try to reduce the
If you are using alpha transparency, you should be aware that IE doesn't
fully support that by default, and will use the saved background colour
as the background. If ticked, this is saved as the currently selected
background colour in the GIMP. If not ticked, I think it is black.
Gamma is theoretically a good thing to save, as your pictures will
display correctly of different platforms - unfortunately, support for
this is not universal.
The other options aren't really worth thinking about for your application.
If you're worried about file size, you should look at pngcrush, a
command-line utility that can find the absolute smallest size your PNG
can be reduced to.
and i've remade my site with new
pictures but didn't think of image size upon rendering and, obviously,
i don't really want to re-render or re-save as jpeg (as i would have to
change the html then)
Multi-file search and replace is a feature of several freeware
applications, and shouldn't take a minute. "Photographic" images should
be saved as JPEG, with PNG reserved for "graphics" or line art.