somert8,
If you are using CS2, the way I do it is to resize the image to 1024 pixels wide (landscape) or 800 pixels high (portrait) by
Image > Image Size , entering the dimensions I've just given, ensuring that all boxes "Scale Styles", "Constrain Proportions" and "Resample Image" are ticked. I use the option "Bicubic" against the Resample Image box.
Then
File > Save As , give the file a suitable new name, and pick JPEG as the file format. Click on "Save".
You are then presented with a JPEG options dialogue box with a numerical setting for Image Options. I find that a setting of 6 or 7 is quite good enough for viewing on WPF. This should get you a file size of typically 100kB to 130kB (depending on the picture).
Hope this helps.
Duncan
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