Fixing Tools
Auto Contrast
Auto balances the contrast making the darkest parts, dark and the lightest parts light.
Auto Levels
Auto balances colors based upon the dark and light colors.
Barrel Distortion
Allows lens distortions to be removed or added to a photo.
Brightness & Contrast
Adjust the photo's brightness or contrast. Can be used to lighten or darken photos or to make photos more contrasty.
Color Balance
Adjust each color channels intensity.
White Balance
Adjusts the balance between blue and red color. Can be used to fix incorrect camera white balance.
Digital Flash
Allows a flash to be applied after the photo has been taken, can be used to lighten dark subjects.
Exposure
Adjust the exposure of a photo, can make it darker as it if was a shorter exposure or lighter like a shorter exposure.
Levels
Allows you to set the dark and light points of a photo, similar effects to contrast but with more control.
Red Eye Reduction
Simply set the correct size and click on red eyes to watch them change back to normal. You can easily remove incorrect red eye fixes by clicking on them.
Shadows & Highlights
Lighten up dark areas or darken light areas. Can be used to simulate a Fake HDR effect. [Information on HDR (Wikipedia)]
Sharpen
Can make some blurry photos clearer.
Straighten
Make minor rotations to a photo to straighten it up, for more drastic rotation check the rotate button on the toolbar.
Color Adjustments
Bit Depth Simulation
Reduces the color palette of the photo to either 4, 16 or 256 colors.
Duo Tone
Reduces the colors to 2 and allows the colors to be specified.
Channel Contrast
Adjust the contrast of the photo, but specifically certain color channels.
Colorize
Adjusts all the colors using a base color, by default starts from black, but the option color shift will start from white.
2-Strip Technicolor Simulation
Simulates the old Technicolor photos
Grayscale
Makes a color photo black and white, with a variety of methods and a focal point.
Hue & Saturation
Adjust the hue or saturation of a photo.
Interlace
Adds horizontal lines to the photo, a choice of either large or small lines.
Inverse
Inverts either the light or the colors of a photo.
Over Burn
Burns the photo, similar to contrast, but far more extreme.
Overlay
covers the layer with either a color, gradient or picture with opacity.
Posterize
Allows the colors to be reduced to a specific setting.
Sepia
Makes the photo look like a sepia photo.
Artistic Adjustments
Blur
Applies a blur to the photo, the radius of the blur can be specified as can a focal point. The focal point can be used to place the focus on a specific part of the photo.
Motion Blur
Various effects that can simulate motion in the photo.
Confetti
Adds confetti and various shapes to the photo, as if confetti was being thrown when the photo was taken.
Diffuse
Diffuse the colors of the photo to create, can look like a diffused lens.
Flip
Flips the photo either, vertically, horizontally or in both directions. This effect is specific to the layer it is being used upon. To apply a flip to the overall photo, use the Flip command in the rotate menu on the toolbar.
Halftone
Simulates the halftone effect used in printing, where larger dots represent darker colors.
Line Art
Simulates a line drawing from the photo.
Mosaic
Various options for representing the photo as a form of mosaic, with block, circles and such.
Oil Painting
Can make the photo look like it was painted using oil paints.
Pop Art
For that classic Andy Warhol look...
Scale Layer
Use to scale the layer down or up in size and to move it.
Segment
Divides the photo up into chunks.
Strings
makes the photo look like it was painting onto strings.
Texture
Applies a texture to the photo, can be used to simulate canvas material.
Wave
Distorts the photo as it were viewed through water with ripples.
Water Drops
places realistic water drops on the photo.
Finishing Touches
Date Stamp
Stamps the date the photo was taken. This feature requires that the date is stored in the EXIF meta data of the photo.
Matte
Adds a matte to the photo for various framing techniques. Different shapes and effects are available.
Captions & Text
Add text & text bubbles to a photo easily using this effect.
Vignette
Simulates 'light fall off' from lens, adjustable colors and size.
Gloss
Simulates the photo having a glossy sheen to it.
Borders
Place a border or frame around the edge of the photo.
Reflection
Adds a 3D reflection to the photo.