Resizing
From the menu bar choose Image > Image Size....
In the Image Size dialog box uncheck resampling and enter 72 for resolution which is the resolution neccessary for a web scrapbook.
After entering 72 ppi for the resolution, note the dimensions (the width and height) for the image.
Resolution for an image
changes depending upon the usage.
Web
images use 72 ppi
Laser prints use 150 to 200 ppi
Offset printing use 225 to 300 ppi
Resampling
If the dimensions (width and height) are too large you have to resample the image. Check the resampling box.
Enter a new width of 800 pixels. You do not have to change the height since the constrain proportions is checked.
After resampling your image you will need to sharpen it.
Resampling means to add or delete pixels from your image and results in lost of clarity and definition. The more drastic the change the greater the degration of the image.
Note in this example the original Pixel Dimension was 3.49 meg and will be resampled down to a file size of 1.22 meg.
