Windows Photo Gallery, which comes pre-installed in all editions of Windows Vista, uses a different method to save pictures than other image editing software. Instead of having a "Save" option in the "File" menu, Windows Photo Gallery automatically saves your image when you fix your picture, then returns to the Gallery. Windows Photo Gallery saves the changes over your original photo, then provides "Undo" and "Revert to Original" tools to restore your original. Windows Photo Gallery also includes a tool that lets you copy your picture to preserve the original.
Click "Start," then "All Programs" and then "Windows Photo Gallery." In the Gallery, double-click the picture you'd like to edit. Select "File" and "Make a Copy." Give the copy of your image a new file name to distinguish it from the original. Click "Save."
Select "Fix" from the toolbar above the photo. Use the tools in the right pane to edit your picture. Click the "Adjust Exposure" tool and move the sliders to adjust the brightness and contrast. Select "Adjust Color" to change the color temperature, tint and saturation. If you don't feel comfortable adjusting your picture's exposure and color manually, click "Auto Adjust." Select "Crop Picture," click and drag the white box and click "Apply" to trim your picture down. Select "Fix Red Eye," then click and drag around the eye area to remove red eyes from your photo.
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Click "Back to Gallery" when you're finished with your edits. Windows Photo Gallery will display a "Saving..." message. If it saved successfully, your edited photo will be visible in the Gallery. The copy of your original picture should appear at the end of the Gallery.
Select the image, click "Fix" again, then select "Revert to Original" in the lower right-hand corner of the screen or from the "File" menu to remove your changes. If you decide to keep your changes or the image won't revert, you can treat your copy as if it were the original picture.