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Hi :)
I tend to save pictures in 3 different formats to see which gives the best
result for the least size.  I would always keep a copy of the original.

Gif tends to be about 1/10th the size of jpgs or pngs but it doesn't work
well
on smoothly changing shades so some of the pictures on pages 15, 17, 19,
20, 26,
57, 79, 81, 111, 116, 120, 127, 135, 136 and 139 might not work well but
all the
rest will probably be better as gifs.

To change formats in Ubuntu just install gimp


I've got it


and use "Save As ... " the change the file-ending from .jpg (for example)
to
.gif.  Sometimes png is lighter-weight or sometimes jpg although usually
those 2
formats tend to be better for photos.  Png tends to be higher quality than
jpg
but it is also often lighter-weight.  Not always tho which is why i try all
3
before committing myself to 1.

Note that just changing the format of an image can cause it to degrade a
bit or
even a lot and changing the entire document to pdf can cause further errors
to
creep into images.  At the moment all your images looked fine to a quick
"squint
test".

Do you have all the separate images available to work from?  Can you create
a
new folder for testing different formats?


will play with that

thanks

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