64-bit Performance
Photoshop CS5 has been rewritten from the ground up as a 64bit application.
Streamlined look with new icons and a clean interface.
Mini Bridge
Users can now access Adobe Bridge without having to leave Photoshop.
Dock the Mini Bridge panel to the bottom and view your images as a filmstrip.
Drag files directly from Mini Bridge into Photoshop & InDesign for an even more efficient workflow.

Access multiple files and run different a variety of Photoshop Actions from within the panel.
Press the spacebar to access a Full screen preview of any supported file types- including video and 3D.
Use Context sensitive menus to sync Bridge and MiniBridge.

Bridge Improvements
Renaming a single image or a group of images just got even easier with the improved Batch Rename.

See where you are and get to where you need to go faster with the improved Path bar
Output to PDF with a watermark for added security for your work.

Content- Aware Fill Technology
Take your use of the Spot Healing Brush to the next level with Content Aware Fill Technology.
The Edit > Fill command in Photoshop now employs Content Aware as well, letting you create smoother removal of items in less time.
copyright Istockphoto/ArtisticCaptures
Puppet Warp
Easily warp pixels on your image using an automatically generated mesh.
Drop pins to serve as handles for your anchor points. Play with different modes for distortion. Puppet Warp even works on Smart Objects.

Customizable Bristle Tips
Unparalleled control over the customization of your brush bristle tip. You can define bristle parameters such as length, thickness, density, making your brushstrokes as natural as possible.
Use your customized tips with variety of PS brush tools (e.g. Mixer brush, Eraser, Clone Stamp)
Use the Brush Preview (bottom of Brush panel) to toggle a preview of what Bristles looks like when you paint on your image

Enhanced Flash Panel Support
Flash Panels in Photoshop CS5 are based on Adobe AIR
Includes full WebKit (HTML) rendering
Enables drag &anp; drop support, local file access, and multi-window support
GPU features: Other
Scrubby Zoom (Click and drag left or right to zoom in/out)
Crop with Rule of Thirds or Grid overlay Improved preference controls for GPU related features

Windows 7
Photoshop also has enhancements made for Windows 7 multitouch (support for non-Wacom tablets and interface)
Mixer Brush
Unleash your inner artist, as now you are able to blend colors together on canvas Blend colors in a new document, or blend the colors that are in an image to create photorealistic works of art.
Use the presets in options bar to define wetness of canvas and amount of paint mixed from canvas to the brush.
Load/Clean your brushes after each stroke. Painting with a dirty brush can produce great results!
Alt/Opt click to define multiple colors on a brush tip
Use the Load Preview option in the Toolbar to see what your multiple colors will look like.
Sample painting colors from any layer in the Photoshop document.

General Painting Enhancements
Improved overall performance with the painting engine complete with a new Brush Preset Panel.
Change your brush size and hardness with the same keyboard shortcut. (Mac: Ctrl-Opt-drag Win: Right Click-Alt-drag) *
Brand new on screen color picker (heads-up display) with shortcuts to invoke (Mac: Ctrl-Opt-Cmd-drag, Win: Right Click-Alt-Shift-drag *
You now have the option to see your color information as Color Wheel or ColorStrip
The Eyedropper tool can also use the Color Sampler Tool.
Photoshop CS5 now supports the Wacom Intuos4 Art Pen and support for barrel rotation

Selections: Refine Edge
Create better selections using Smart Radius- the ability detect soft and hard edges and adjust radius accordingly
Improved auto-radius capability Color decontamination for better selection adjustments.
Automatic output to different layer types from a dialog box. The Refine Edge dialog has been streamlined for a better experience.

HDR Pro
HDR has been taken to the next level with HDR Pro with an improved UI, and faster algorithms
Access HDR Pro from Mini Bridge, Bridge, and Lightroom
Get to your final image faster with default presets
Create one’s own presets for your own specific projects
Best in class De-ghosting (Automatic alignment and removal of blur from moving objects).
The De-ghosting can change assigned reference image (indicated by green bounding box)
To give a single image the HDR Effect, you now have an HDR Toning adjustment Access from Image > Adjustments > HDR Toning

Lens Correction With the new version of Photoshop you can create lens profiles or select from preset to automatically correct for lens distortions
ACR 6
Improved noise reduction , also known as demosaicing
Enhancements have been made to the Post-crop vignette
Improved Sharpening algorithm to address tone, contrast and fidelity of details
The new rendering engine allows for better toning and sharpening
Lens correction will be included in Camera Raw

Layer Management
Create more organized Photoshop documents with deeper layer set nesting
Adjust opacity/fill of multiple layers at once
Ability to set default values for each of the effects in the Layer Styles dialog box

Now you can drag and drop to place a file from the desktop onto an open image Edit > Paste in Place command has been enhanced for better positioning Drag a layer from Layers panel to another open document tab
Enhanced interoperability
FXG (round-trip skinning of assets placed in Flash Catalyst)
JDI: Just Do It
Automatically save a 16-bit JPEG file as an 8-bit file
Added the “Straighten” button to the Ruler Tool. Clicking it will crop and straighten a photo. Opt/Alt-clicking it will straighten the photo without cropping it.
Save all now has a checkbox to apply to all

Save As now lets you save to the original folder
Lens Correction is now a top-level item under Filters
Sticky settings in Layers Styles

Preference to turn off Mac gestures on a touchpad
Option to Auto-Select Targeted Adjustment Tool (enables easier access to setting points on a curve) in the Adjustments Panel
Option to Auto-Select Parameter when selecting an adjustment layer (behavior more like adjustment dialogs) in the Adjustments Panel
Option to assign a shortcut to the Targeted Adjustment Tool via Edit�>Keyboard Shortcuts.
To put keyboard focus onto the first field in Adjustments, hit Shift-Return on the keyboard
OpenEXR plug-in now handles transparency as alpha
Create layer mask from a transparent layer
Neutral density preset for the Gradient tool
Default Shadow/Highlights changed to 35%
New creative resources including actions, tools, presets, brushes, swatches, shapes, gradients, styles, 3D shapes and tool presets
Save print settings with image file allowing one-button printing with user selected values
Preference to control whether Photoshop adds “Copy” to layer names when duplicating layers (found under Layers panel flyout menu)
Added a “Don’t Show Again” checkbox to the “Maximize Compatibility” dialog
Easier access to legacy keyboard shortcuts for switching among channels
Option to control whether files are placed as Smart Objects
Ability to open Animated GIF files & preserve their frames
Option to copy color as a Hex value (via the Color panel flyout menu)
Option to choose the behavior of Cmd-H on Mac (Hide Photoshop or Hide Extras), making it easier to choose a behavior based on your operating system
Panorama stitching (Auto-Align Layers) now leverages lens correction profiles
Contact Sheet and Extract – will still work if running in 32-bit
CS Review – service for collaborative review in PS, ID, AI and Premiere
Photoshop CS5 Extended : 3D
Easily create 3D extrusions, inflations, bevels from variety of sources using Adobe Repousse
Creates a 3D layer that can be used with all other 3D tools
Photoshop CS5 now has a New Raytracer with progressive rendering and performance improvements Selective Rendering
You now have a preference to Resume Rendering
Change the Raytrace setting – Draft or Final mode- from Quality menu in 3D Scene Panel
Now includes an Easy ground plane shadow catcher
Photoshop CS5 now includes a new Materials Library and browser
Use the Material dropper tool to load (hold down ALT) and drop material elsewhere
Material Presets also come installed in this version
Download additional presets for Photoshop CS5 from 3D > Browse 3D Content online
New Material Select tool with bounding box overlay on canvas
Show/Hide Overlays from bottom of 3D panel shows overlays for materials and mesh boundaries and lights From Camera Zoom tool, set blur and distance for DOF. Use Alt+click on target to set as plane of focus (Distance)
Context-sensitive widget (Object, camera, mesh, lights) – Select appropriate tool from 3D Scene panel to invoke 3D axis for that element
New Light source – Image Based Lights: Set your light source as a color or an image (ideally a 32-bit HDR)
Scene Panel UI enhancements
3D merging enhancements
Automatically match cameras for different scales
Photoshop CS5 now includes 3D landing page – Browse 3D Content online from 3D menu
Interoperability enhancements
OBJ import improvements and performance
Reparameterization optimized