Multilayer Opacity and Fillâ”and so much more
The ability to select multiple layers and adjust the Opacity or Fill was at the top of many Photoshop users lists. From text to image data, those living in layers will enjoy massive amounts of time saved. Speaking of layers, you can now choose your own default layer styles (just click the Make Default button in the Layer Style dialog).
Adobe Photoshop CS5
By Bryan O'Neil Hughes