Two simple methods for inverting an image without changing the colours.
1. Open the image for editing.
2. Invert (Ctrl+I) the current layer...

Editor's Pick in Photo Editing, August 2005
Learn how to stylize any photo to emulate a highly detailed watercolor painting with a pen outline.

Editor's Pick in Photo Editing, August 2005
Let's go grunge! Today we'll add a dirty overlay to an image to create the familiar look that is of late so popular.

Increase the size of a fire.
1. Open the image for editing.
2. Duplicate the current layer (Ctrl+J) and change the blending mode of the new layer to Difference...

A quick and effective technique to make waterfalls larger.
1. Open the image for editing.
2. Duplicate the current layer (Ctrl+J) and set the blending mode of the new layer to Screen...

There are lots of ways to make a photograph look like a painting. Here's another one that simulates painted strokes by blurring dark areas of the image and sharpening lighter areas. It takes just a few steps and works very well with landscapes and other images that include lots of detail...

Using a gradient and the Render> Difference Clouds filter, we can quickly create a number of different types of backgrounds. You can produce retro tie-dye 60s-looking backgrounds, more psychedelic looks, and even some elegantly-complex patterns...

An interesting background effect, suitable perhaps for a Web interface or layering for a "Eurocollage" image, can be created by separating elements of a black-white-black gradient to individual layers, then using reversed bevels...

Sometimes a drop shadow needs to fall on only part of the layer or layers below. Perhaps the shadow should fall on the content of the layer immediately below, but not the layer below that. You'll need to convert the drop shadow layer effect to a layer of its own, then edit that layer...

Editor's Pick in Photoshop Tutorials
A layer mask enables you to create areas of transparency without erasing the layer content. Making one is easy, if you know the technique.