preferences

Thats normal. JPEG (JPG) is a common used file format in the web, supported by any important web browser for long years.
Display of TIFF is not supported by common web browsers.
TIFFs have their place in lossless quality archiving of images, but are not suitable for the web (to big in data-size) and definitely not suitable as background-images.
So convert the image you like for background into JPG ...

HTH ...

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Seen in zaphod home page (?)

I'm using a jpeg but mine's too big it loads slowly. any idea for the right size? there's no FAQ page here on iper.

hi dana!

for backgrounds I suggest filesizes under 50 kb for acceptable performance.
HTH

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Seen in my account recent activity (?)

Thank you , Z!

thx...that's what i assumed...although i must say that i've had good results transferring files from elsewhere to here using the tiff format....somehow i just don't believe that there is no image degradation of digital files from generation to generation...

maybe it's just my imagination and more a question of different site upload softwear...as you can see i'm not a cyber head

hi jo

On image size, well jpeg is the normal usage for computer display. I am questioning the soundness of archiving my work online at least in these sharing sites. I'm more inclined to archive my work in an online service dedicated to storing any digital file type. Then the size is less important. On these sites for quicker viewing you want to stay a bit smaller size. And for viewing online the maximum display on the majority of monitors currently is 72 dots per inch. Doesn't matter how good your image is that is what will show.

On backgrounds Zaphod is right on the money. I have noticed problems with people who have big old files up there.

What makes up the file size for your picture is the dimensions, for example 800 X 600 pixels and resolution. Many scanned images start out as 300 dots per inch which gives you a lot of pixels and a very large file size picture. In photoshop you can change those both the dimension and the resolution. And in photoshop you can also squeeze the image but you lose some quality with a tradeoff of quality versus speed of loading. The eye can't always tell the difference, depends on you and also your monitor. Speed will vary.

So that is a bit of the stuff, too much I guess.