Picasa - Creating a collage

Edit your photos

Picasa provides a range of one-click fixes to help you improve almost any photo,

adjust its color and lighting, and add effects like black and white or sepia toning. Double-click a photo and use the three editing tabs on the left.

Basic Fixes	Tuning
Make simple edits -- such as cropping, straightening, removing redeye, retouching blemishes, or adding text -- to your photos. Or click I'm Feeling Lucky to try Picasa's all-in-one lighting and contrast fix. Learn more about Basic Fixes	Use the sliders to adjust the color and lighting aspects of your photo to produce a more visually enhanced image. Learn more about Tuning

Effects

Choose from 12 effects to make your photos more interesting: Sharpen, convert to sepia or black and white, warm the photo, apply tint, saturate the colors, and more. Learn more about Effects

Don't worry -- Picasa always preserves your original photo. The photo edits you make are only viewable in Picasa until you decide to save your changes. Even then, Picasa creates a new version of the photo with your edits applied, leaving the original totally preserved.