1. Adobe Photoshop CS Design Professional SELECTIONS ENHANCING SPECIFIC

2. Chapter I2Working with Layers Create an alpha channel Use Extract to isolate an object Erase areas in an image to enhance appearance Fix imperfections in an image Use the Magic Wand Tool to select objects Learn how to create snapshots Create multiple-image layouts Chapter Lessons

3. Chapter I3Working with Layers Nearly every image opened or created in Photoshop is separated into channels Channels are used to house the color information for each layer and layer mask in an image Using Channels

4. Chapter I4Working with Layers Isolate areas using the Extract feature Erase areas using a variety of eraser tools Take a sample and then paint that sample over an area using the Clone Stamp Tool Fixing Imperfections

5. Chapter I5Working with Layers Creating Snapshots Use the snapshot command to make a temporary copy of any state of an image The snapshot is added to the top of the History palette

6. Chapter I6Working with Layers Advantages of Snapshots Name a snapshot to make it easy to identify and manage Compare changes to images easily: take a snapshot before and after making changes Recover work easily

7. Chapter I7Working with Layers Using Automation Features Create an image that contains various sizes of the same image or several different images Use the Picture Package feature to print images in a variety of sizes and shapes on a single sheet Create a contact sheet consisting of thumbnail images

8. Chapter I8Working with Layers Create an Alpha Channel Defining Channels Created automatically in a new document Used to store color information about images Example: –A CMYK image has at least four channels (cyan, magenta, yellow, black)

9. Chapter I9Working with Layers More on Channels An image can consist of from 1 to 24 color channels Default channels are color channels contained in an image and created automatically Add Alpha or Spot channels to images displayed in all color modes, except the bitmap modes

10. Chapter I10Working with Layers Alpha and Spot Channels Alpha Channels and Spot Channel specific color information added to the image Alpha channel is used to: –Create and store masks to manipulate, isolate, or protect parts of an image Spot channel contains: –Information about special pre-mixed inks used in CYMK color printing

11. Chapter I11Working with Layers Understanding Alpha Channels Create on the Channels palette Can create an alpha channel that masks all or specific areas of a layer Use alpha channels to: – Preserve a selection to experiment with –Use later –Create special effects –Save and reuse in other images

12. Chapter I12Working with Layers Saving an Alpha Channel Use the following formats to save an alpha channel: –PSD –PDF –PICT –TIFF –Raw Alpha channels do not print

13. Chapter I13Working with Layers Understanding the Channels Palette Lists all the default channels contained in a layer Manages all the image’s channels To access: –Click the Channels tab next to the Layers tab

14. Chapter I14Working with Layers Order of Channels On the Channels palette, channels appear in the following order: –Composite channel: combination of other default channels –Additional default channels that are based on existing color modes –Spot color channels –Alpha channels

15. Chapter I15Working with Layers Channels Palette

16. Chapter I16Working with Layers Channel Properties Hide channels Re-order channels View channels as thumbnails on the Channels palette

17. Chapter I17Working with Layers Creating an Alpha Channel Select a portion of an image Click the Save selection as channel button on the Channels palette Double-click the Alpha 1 thumbnail on the Channels palette Click the color box in the Channel Options dialog box Set the color and select options

18. Chapter I18Working with Layers Alpha Layer Example Red alpha channel overlaying blue produced purple Before After

19. Chapter I19Working with Layers Use Extract to Isolate an Object Isolating Objects Use the Extract feature to isolate a foreground object from its background After extracting an image, modify the extracted object layer as required

20. Chapter I20Working with Layers Using Extract Use tools in the Extract dialog box to extract objects: –Use the Edge Highlighter Tool to trace the edge of the object to extract –Use the Fill Tool to select everything inside the edge

21. Chapter I21Working with Layers Extraction Tools

22. Chapter I22Working with Layers Erase Areas in an Image to Enhance Appearance Erasing Areas Use Eraser tools to erase an area without going through the extraction process Three Eraser tools are available: –Eraser Tool –Background Eraser Tool –Magic Eraser Tool

23. Chapter I23Working with Layers Eraser Tool Examples Eraser tool exposes background color Magic Eraser erases similarly colored pixels Background Eraser exposes transparency of the layer below

24. Chapter I24Working with Layers Fix Imperfections in an Image Touching Up Areas Use the Clone Stamp Tool to copy a sample in an image, then paste it over an area to cover Size of the sample taken depends on the brush tip size selected

25. Chapter I25Working with Layers Using the Clone Stamp Tool Object to delete Sampled area applied to hide portions of the object

26. Chapter I26Working with Layers Use the Magic Wand Tool to Select Objects Using the Magic Wand Tool Use the Magic Wand Tool to choose pixels that are similar to pixels clicked in an image Specific tolerance settings Specify whether to select only contiguous pixels

27. Chapter I27Working with Layers Understanding Tolerance Tolerance setting determines the range of colors that can be selected with the Magic Wand Tool Example: –Low tolerance: Magic Wand Tool selects a narrow range of pixels –High tolerance: Magic Wand Tool selects a wider range of pixels

28. Chapter I28Working with Layers Using the Eyedropper Tool Area selected by the Magic Wand Tool is related to the settings for the Eyedropper Tool While working with the Magic Wand Tool, verify or change Eyedropper Tool settings as needed

29. Chapter I29Working with Layers Learn How to Create Snapshots Understanding Snapshots Create a snapshot of of the History palette image: –Before beginning an editing session –After crucial changes have been made Use the snapshot to revert to original image settings, if required

30. Chapter I30Working with Layers Creating a Snapshot Click the Create new snapshot button on the History palette Each new snapshot is numbered consecutively Snapshots appear in order at the top of the History palette

31. Chapter I31Working with Layers Snapshot Commands: History Palette

32. Chapter I32Working with Layers Create Multiple-Image Layouts Understanding a Picture Package Generate 20 types of multiple- image layouts A picture package can contain multiple sizes of a single image

33. Chapter I33Working with Layers Sample Picture Package

34. Chapter I34Working with Layers Assembling a Contact Sheet Assemble a maximum of 30 thumbnail images in a folder

35. Chapter I35Working with Layers Chapter I Tasks Define channels and create an alpha channel Use the Extract feature to isolate objects Use Eraser tools Use the Clone Stamp Tool to fix errors

36. Chapter I36Working with Layers Chapter I Tasks Use the Image Wand Tool to select objects Create and use snapshots Use the Picture Package feature to create multiple-image layouts