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“对抗癌药品力争降到零税率”是表态更是决心

Photoshop
  1. Photoshop User Guide
  2. Introduction to Photoshop
    1. Dream it. Make it.
    2. What's new in Photoshop
    3. Edit your first photo
    4. Create documents
    5. Photoshop | Common Questions
    6. Photoshop system requirements
    7. Photoshop system requirements
    8. Get to know Photoshop
    9. Keep Photoshop up to date
  3. Photoshop and other Adobe products and services
    1. Work with Illustrator artwork in Photoshop
    2. Work with Photoshop files in InDesign
    3. Substance 3D Materials for Photoshop
    4. Use the Capture in-app extension in Photoshop
  4. Photoshop on mobile (not available in mainland China)
    1. User guide
    2. What's New?
    3. Technical requirements? ??
  5. Photoshop on the iPad?(not available in mainland China)
    1. Photoshop on the iPad | Common questions
    2. Get to know the workspace
    3. System requirements | Photoshop on the iPad
    4. Create, open, and export documents
    5. Add photos
    6. Work with layers
    7. Draw and paint with brushes
    8. Make selections and add masks
    9. Retouch your composites
    10. Work with adjustment layers
    11. Adjust the tonality of your composite with Curves
    12. Apply transform operations
    13. Crop and rotate your composites
    14. Rotate, pan, zoom, and reset the canvas
    15. Work with Type layers
    16. Work with Photoshop and Lightroom
    17. Get missing fonts in Photoshop on the iPad
    18. Japanese Text in Photoshop on the iPad
    19. Manage app settings
    20. Touch shortcuts and gestures
    21. Keyboard shortcuts
    22. Edit your image size
    23. Livestream as you create in Photoshop on the iPad
    24. Correct imperfections with the Healing Brush
    25. Create brushes in Capture and use them in Photoshop?on the iPad
    26. Work with Camera Raw files
    27. Create and work with Smart Objects
    28. Adjust exposure in your images with Dodge and Burn
    29. Auto adjustment commands in Photoshop on the iPad
    30. Smudge areas in your images with Photoshop on the iPad
    31. Saturate or desaturate your images using Sponge tool
    32. Content aware fill for iPad
  6. Photoshop on the web (not available in mainland China)
    1. User guide
    2. What's new in Photoshop
    3. Technical requirements
    4. Common questions
    5. Draw and edit Shapes
    6. Work with anyone on the web
  7. Photoshop (beta) (not available in mainland China)
    1. Get started with Creative Cloud Beta apps
    2. Photoshop (beta) on the desktop
    3. Reference Image
    4. Blend objects into any background with Harmonize
    5. Enhance image quality with Generative Upscale
    6. Organize, share, and collaborate with Projects
  8. Generative AI (not available in mainland China)?
    1. Common questions on generative AI in Photoshop
    2. Generative Fill in Photoshop on the desktop
    3. Generate Image with descriptive text prompts
    4. Generative Expand in Photoshop on the desktop
    5. Replace background with Generate background
    6. Get new variations with Generate Similar
    7. Select an AI model for generative control
    8. Generative Fill in Photoshop on the iPad
    9. Generative Expand in Photoshop on the iPad
    10. Generative AI features in Photoshop on the web
  9. Content authenticity (not available in mainland China)
    1. Content credentials in Photoshop
    2. Identity and provenance for NFTs
    3. Connect accounts for creative attribution
  10. Cloud documents (not available in mainland China)
    1. Photoshop cloud documents | Common questions
    2. Photoshop cloud documents | Workflow questions
    3. Manage and work with cloud documents in Photoshop
    4. Upgrade cloud storage for Photoshop
    5. Unable to create or save a cloud document
    6. Solve Photoshop cloud document errors
    7. Collect cloud document sync logs
    8. Invite others to edit your cloud documents
    9. Share documents for review
  11. Workspace
    1. Workspace basics
    2. Preferences
    3. Learn faster with the Photoshop Discover Panel
    4. Create documents
    5. Place files
    6. Default keyboard shortcuts
    7. Customize keyboard shortcuts
    8. Tool galleries
    9. Performance preferences
    10. Contextual Task Bar
    11. Use tools
    12. Presets
    13. Grid and guides
    14. Touch gestures
    15. Use the Touch Bar with Photoshop
    16. Touch capabilities and customizable workspaces
    17. Technology previews
    18. Metadata and notes
    19. Place Photoshop images in other applications
    20. Rulers
    21. Show or hide non-printing Extras
    22. Specify columns for an image
    23. Undo and history
    24. Panels and menus
    25. Position elements with snapping
    26. Position with the Ruler tool
  12. Image and color basics
    1. How to resize images
    2. Work with raster and vector images
    3. Image size and resolution
    4. Acquire images from cameras and scanners
    5. Create, open, and import images
    6. View images
    7. Invalid JPEG Marker error | Opening images
    8. Viewing multiple images
    9. Customize color pickers and swatches
    10. High dynamic range images
    11. Match colors in your image
    12. Convert between color modes
    13. Color modes
    14. Erase parts of an image
    15. Blending modes
    16. Choose colors
    17. Customize indexed color tables
    18. Image information
    19. Distort filters are unavailable
    20. About color
    21. Color and monochrome adjustments using channels
    22. Choose colors in the Color and Swatches panels
    23. Sample
    24. Color mode or Image mode
    25. Color cast
    26. Add a conditional mode change to an action
    27. Add swatches from HTML CSS and SVG
    28. Bit depth and preferences
  13. Layers
    1. Layer basics
    2. Nondestructive editing
    3. Create and manage layers and groups
    4. Select, group, and link layers
    5. Place images into frames
    6. Layer opacity and blending
    7. Mask layers
    8. Apply Smart Filters
    9. Layer comps
    10. Move, stack, and lock layers
    11. Mask layers with vector masks
    12. Manage layers and groups
    13. Layer effects and styles
    14. Edit layer masks
    15. Extract assets
    16. Reveal layers with clipping masks
    17. Generate image assets from layers
    18. Work with Smart Objects
    19. Blending modes
    20. Combine multiple images into a group portrait
    21. Combine images with Auto-Blend Layers
    22. Align and distribute layers
    23. Copy CSS from layers
    24. Load selections from a layer or layer mask's boundaries
    25. Knockout to reveal content from other layers
  14. Selections
    1. Get started with selections
    2. Make selections in your composite
    3. Select and Mask workspace
    4. Select with the marquee tools
    5. Select with the lasso tools
    6. Adjust pixel selections
    7. Move, copy, and delete selected pixels
    8. Create a temporary quick mask
    9. Select a color range in an image
    10. Convert between paths and selection borders
    11. Channel basics
    12. Save selections and alpha channel masks
    13. Select the image areas in focus
    14. Duplicate, split, and merge channels
    15. Channel calculations
  15. Image adjustments
    1. Replace object colors
    2. Perspective warp
    3. Reduce camera shake blurring
    4. Healing brush examples
    5. Export color lookup tables
    6. Adjust image sharpness and blur
    7. Understand color adjustments
    8. Apply a Brightness/Contrast adjustment
    9. Adjust shadow and highlight detail
    10. Levels adjustment
    11. Adjust hue and saturation
    12. Adjust vibrance
    13. Adjust color saturation in image areas
    14. Make quick tonal adjustments
    15. Apply special color effects to images
    16. Enhance your image with color balance adjustments
    17. High dynamic range images
    18. View histograms and pixel values
    19. Match colors in your image
    20. Crop and straighten photos
    21. Convert a color image to black and white
    22. Adjustment and fill layers
    23. Curves adjustment
    24. Blending modes
    25. Target images for press
    26. Adjust color and tone with Levels and Curves eyedroppers
    27. Adjust HDR exposure and toning
    28. Dodge or burn image areas
    29. Make selective color adjustments
  16. Adobe Camera Raw
    1. Camera Raw system requirements
    2. What's new in Camera Raw
    3. Introduction to Camera Raw
    4. Create panoramas
    5. Supported lenses
    6. Make color and tonal adjustments in Camera Raw
    7. Vignette, grain, and dehaze effects in Camera Raw
    8. Default keyboard shortcuts
    9. Automatic perspective correction in Camera Raw
    10. Radial Filter in Camera Raw
    11. Manage Camera Raw settings
    12. Open, process, and save images in Camera Raw
    13. Repair images with the Enhanced Spot Removal tool in Camera Raw
    14. Rotate, crop, and adjust images
    15. Adjust color rendering in Camera Raw
    16. Process versions in Camera Raw
    17. Make local adjustments in Camera Raw
    18. Remove unwanted people
    19. Remove reflections
    20. View AI Edit Status and manage updates
  17. Image repair and restoration
    1. Remove unwanted objects and people with the Remove tool
    2. Remove objects from your photos with Content-Aware Fill
    3. Content-Aware Patch and Move
    4. Retouch and repair photos
    5. Correct image distortion and noise
    6. Basic troubleshooting steps to fix most issues
  18. Image enhancement and transformation
    1. Replace sky in your images
    2. Transform objects
    3. Adjust crop, rotation, and canvas size
    4. How to crop and straighten photos
    5. Create and edit panoramic images
    6. Warp images, shapes, and paths
    7. Vanishing Point
    8. Content-aware scaling
    9. Transform images, shapes, and paths
  19. Drawing and painting
    1. Paint symmetrical patterns
    2. Draw rectangles and modify stroke options
    3. About drawing
    4. Draw and edit shapes
    5. Painting tools
    6. Create and modify brushes
    7. Blending modes
    8. Add color to paths
    9. Edit paths
    10. Paint with the Mixer Brush
    11. Brush presets
    12. Gradients
    13. Gradient interpolation
    14. Fill and stroke selections, layers, and paths
    15. Draw with the Pen tools
    16. Create patterns
    17. Generate a pattern using the Pattern Maker
    18. Manage paths
    19. Manage pattern libraries and presets
    20. Draw or paint with a graphics tablet
    21. Create textured brushes
    22. Add dynamic elements to brushes
    23. Gradient
    24. Paint stylized strokes with the Art History Brush
    25. Paint with a pattern
    26. Sync presets on multiple devices
    27. Migrate presets, actions, and settings
  20. Text
    1. Add and edit the text
    2. Unified Text Engine
    3. Work with OpenType SVG fonts
    4. Format characters
    5. Format paragraphs
    6. How to create type effects
    7. Edit text
    8. Line and character spacing
    9. Arabic and Hebrew type
    10. Fonts
    11. Troubleshoot fonts
    12. Asian type
    13. Create type
  21. Filters and effects
    1. Use the Blur Gallery
    2. Filter basics
    3. Filter effects reference
    4. Add Lighting Effects
    5. Use the Adaptive Wide Angle filter
    6. Use the Oil Paint filter
    7. Use the Liquify filter
    8. Layer effects and styles
    9. Apply specific filters
    10. Smudge image areas
  22. Saving and exporting
    1. Save your files in Photoshop
    2. Export your files in Photoshop
    3. Supported file formats
    4. Save files in graphics formats
    5. Move designs between Photoshop and Illustrator
    6. Save and export video and animations
    7. Save PDF files
    8. Digimarc copyright protection
  23. Color Management
    1. Understanding color management
    2. Keeping colors consistent
    3. Color settings
    4. Duotones
    5. Work with color profiles
    6. Color-managing documents for online viewing
    7. Color-managing documents when printing
    8. Color-managing imported images
    9. Proofing colors
  24. Web, screen, and app design
    1. Photoshop for design
    2. Artboards
    3. Device Preview
    4. Copy CSS from layers
    5. Slice web pages
    6. HTML options for slices
    7. Modify slice layout
    8. Work with web graphics
    9. Create web photo galleries
  25. Video and animation
    1. Video editing in Photoshop
    2. Edit video and animation layers
    3. Video and animation overview
    4. Preview video and animations
    5. Paint frames in video layers
    6. Import video files and image sequences
    7. Create frame animations
    8. Creative Cloud 3D Animation (Preview)
    9. Create timeline animations
    10. Create images for video
  26. Printing
    1. Print 3D objects
    2. Print from Photoshop
    3. Print with color management
    4. Contact Sheets and PDF Presentations
    5. Print photos in a picture package layout
    6. Print spot colors
    7. Print images to a commercial printing press
    8. Improve color prints from Photoshop
    9. Troubleshoot printing problems | Photoshop
  27. Automation
    1. Creating actions
    2. Create data-driven graphics
    3. Scripting
    4. Process a batch of files
    5. Play and manage actions
    6. Add conditional actions
    7. About actions and the Actions panel
    8. Record tools in actions
    9. Add a conditional mode change to an action
    10. Photoshop UI toolkit for plug-ins and scripts
  28. Troubleshooting
    1. Fixed issues?
    2. Known issues
    3. Optimize Photoshop performance
    4. Basic troubleshooting
    5. Troubleshoot crash or freeze
    6. Troubleshoot program errors
    7. Troubleshoot scratch disk full errors
    8. Troubleshoot scratch disk full errors
    9. Troubleshoot GPU and graphics driver issues
    10. Find missing tools
    11. Photoshop 3D | Common questions around discontinued features

Preparing images for press

From Photoshop, you can prepare image files for offset lithography, digital printing, gravure, and other commercial printing processes.

Generally, your workflow depends on the capabilities of the prepress facility. Before you begin a workflow for commercial printing, contact the prepress staff to learn their requirements. For example, they may not want you to convert to CMYK at any point because they may need to use prepress-specific settings. Here are some possible scenarios for preparing your image files to achieve predictable printing results:

  • Work entirely in RGB mode and make sure that the image file is tagged with the RGB working space profile. If your printer or prepress staff use a color management system, they should be able to use your file’s profile to make an accurate conversion to CMYK before producing the film and printing plates.

  • Work in RGB mode until you finish editing your image. Then convert the image to CMYK mode and make any additional color and tonal adjustments. Especially check the highlights and shadows of the image. Use Levels, Curves, or Hue/Saturation adjustment layers to make corrections. These adjustments should be very minor. Flatten the file if necessary, then send the CMYK file to the professional printer.

  • Place your RGB or CMYK image in Adobe InDesign or Adobe Illustrator. In general, most images printed on a commercial press are not printed directly from Photoshop but from a page-layout program like Adobe InDesign or an illustration program like Adobe Illustrator. For more information on importing Photoshop files into Adobe InDesign or Adobe Illustrator, see Adobe InDesign Help or the Adobe Illustrator Help.

Here are a few issues to keep in mind when you work on an image intended for commercial printing:

  • If you know the characteristics of the press, you can specify the highlight and shadow output to preserve certain details.

  • If you use a desktop printer to preview the appearance of the final printed piece, keep in mind that a desktop printer cannot faithfully replicate the output of a commercial printing press. A professional color proof gives a more accurate preview of the final printed piece.

  • If you have a profile from a commercial press, you can choose it with the Proof Setup command and then view a soft proof using the Proof Colors command. Use this method to preview the final printed piece on your monitor.

Note

Some printers may prefer to receive your documents in PDF format, especially if the documents need to conform to PDF/X standards. See Save in Photoshop PDF format.

Set output options

If you are preparing your images for commercial printing directly from Photoshop, you can select and preview a variety of page marks and other output options using the Print command. Generally, these output options should be specified only by prepress professionals or people knowledgeable about the commercial printing process.

Photoshop Page marks for printers
Page marks

A. Gradient tint bar?B. Label?C. Registration marks?D. Progressive color bar?E. Corner crop mark?F. Center crop mark?G. Description?H. Star target?

  1. Choose File?> Print.
  2. Choose Output from the pop?up menu.
  3. Set one or more of the following options:

    Calibration Bars

    Prints an 11?step grayscale, a?transition in density from 0 to 100% in 10% increments. With a CMYK color separation, a?gradient tint bar is printed to the left of each CMYK plate, and a progressive color bar to the right.

    Note

    Calibration bars, registration marks, crop marks, and labels are printed only if the paper is larger than the printed image. ?

    Registration Marks

    Prints registration marks on the image (including bull’s-eyes and star targets). These marks are used primarily for aligning color separations on PostScript printers.

    Corner Crop Marks

    Prints crop marks where the page is to be trimmed. You can print crop marks at the corners. On PostScript printers, selecting this option will also print star targets.

    Center Crop Marks

    Prints crop marks where the page is to be trimmed. You can print crop marks at the center of each edge.

    Description

    Prints any description text entered in the File Info?dialog box, up to about 300 characters. Description text is always printed in 9?point Helvetica plain type.

    Labels

    Prints the file name above the image. If printing separations, the separation name is printed as part of the label.

    Emulsion Down

    Makes type readable when the emulsion is down—that is, when the photosensitive layer on a piece of film or photographic paper is facing away from you. Normally, images printed on paper are printed with emulsion up, with type readable when the photosensitive layer?faces you. Images printed on film are often printed with emulsion down.

    Negative

    Prints an inverted version of the entire output, including all masks and any background color. Unlike the Invert command in the Image menu, the Negative option converts the output, not the on?screen image, to a negative. If you print separations directly to film, you probably want a negative, although in many countries film positives are common. Check with your print shop to determine which is required. To determine the emulsion side, examine the film under a bright light after it has been developed. The dull side is the emulsion; the shiny side is the base. Check whether your print shop requires film with positive emulsion up, negative emulsion up,?positive emulsion down, or negative emulsion?down.

    Background

    Selects a background color to be printed on the page outside the image area. For?example, a black or colored background may be desirable for slides printed to a film recorder. To?use this option, click Background, and then select a color from the Color Picker. This is a printing option only; it does not affect the image itself.

    Border

    Prints a black border around an image. Type a number and choose a unit value to specify the width of the border.

    Bleed

    Prints crop marks inside rather than outside the image. Use this option to trim the image within the graphic. Type a number and choose a unit value to specify the width of the bleed.

    Interpolation

    Reduces the jagged appearance of a low-resolution image by automatically resampling up while printing (on PostScript printers). Resampling may reduce the sharpness of the image quality.

For information on the Include Vector Data option, see Print vector data.

When preparing your image for prepress and working with CMYK images or images with spot colors, you can print each color channel as a separate page.

Note

Separations from CMYK, Duotone, or multi-channel documents printed on non-PostScript printers may not be identical to those printed on PostScript printers.

Photoshop Color channels printed as separate pages
Each color channel printed as a separate page.

Note

If you are printing an image from another application and want to print spot channels to spot color plates, you must first save the file in DCS 2.0 format. DCS 2.0 preserves spot channels. This format is supported by applications such as Adobe InDesign and QuarkXPress.

  1. Make sure that your document is in CMYK Color, Multichannel, or Duotone mode, and then choose File?> Print.
  2. Choose Separations from the Color Handling drop-down menu.
    Note

    Depending on the designated printer and printer drivers on your computer, these options may also appear in the Print Settings dialog box. In Windows, click the Properties button to access the printer driver options; in Mac?OS, use the pop-up menu in the Print Settings dialog box that appears.

  3. Click Print. Separations are printed for each of the colors in the image.

Prepare an image with spot channels for printing from another application

  1. If the image is a duotone, convert it to Multichannel color mode.
  2. Save the image in DCS 2.0 format.
  3. In the DCS 2.0 Format dialog box, deselect the Include Halftone Screen and the Include Transfer Function options.
  4. Open or import the image in Photoshop, and set your screen angles. Make sure that you’ve communicated to the printer the spot color you want for each of the color plates.
    Note

    You can place a PSD file containing spot colors directly in Illustrator or InDesign without special preparation.

Create a color trap

A trap is an overlap that prevents tiny gaps in the printed image caused by a slight misregistration on press. Contact your service provider before you do any trapping. In?most cases, your print shop determines whether trapping is needed. If so, the print shop staff will tell you what values to enter in the Trap dialog box.

Photoshop Trap to prevent misalignment
Trapping to correct misalignment

A. Misregistration with no trap?B. Misregistration with trap?

Trapping is intended to correct the misalignment of solid colors. In general, you don’t need traps for continuous-tone images such as photographs. Excessive trapping may produce an outline effect. These problems may not be visible on-screen and might show up only in print. Photoshop uses standard rules for?trapping:

  • All colors spread under black.

  • Lighter colors spread under darker colors.

  • Yellow spreads under cyan, magenta, and black.

  • Pure cyan and pure magenta spread under each other equally.

  1. Choose Edit > Convert To Profile to view the image in the color space of the output device. See Convert document colors to another profile (Photoshop).

  2. Choose Image?> Trap.
  3. For Width, enter the trapping value provided by your print shop. Then select a unit of measurement, and click?OK. Consult your print shop to determine how much misregistration to expect.

Determine scan resolution for printing

You can use a number of techniques to determine the resolution at which to scan a photograph. If you are scanning photos to be printed, and you know the exact size and the printing screen frequency, you can use the following techniques to determine the scanning resolution. Often it is easiest to scan at your scanner's maximum optical resolution and then resize the image in Photoshop later.

Estimate scan resolution

You can determine the resolution for your scan using the original and final image dimensions and the resolution of your output device. Scan resolution translates into image resolution when you open the scanned image in Photoshop.

  1. Do one of the following:
    • For laser printers and imagesetters, multiply the printer’s screen frequency by 2. To determine your printer’s screen frequency, check your printer documentation or consult your service provider.

    • For inkjet printers, check your printer documentation for the optimal resolution. Many dye sublimation printers and devices that print directly onto photographic paper have an optimal resolution of 300 to 400 dpi.

  2. Determine the ratio of the final image dimensions to the original image dimensions. For example, the ratio of a 6?by?9?inch final image to a 2?by?3?inch original image is 3:1.
  3. Multiply the result of step 1 by the result of step?2.

    For example, suppose you are printing to an imagesetter with a screen frequency of 85 lpi and the ratio of the final image to the original is 3:1. First multiply 85 (the screen frequency) by 2 to get 170. Then multiply 170 by 3 to get a scan resolution of 510 ppi. If you are printing to an inkjet printer with an optimal resolution of 300 dpi, multiply 300 by 3 to get a scan resolution of 900.

    Note

    Different color separation procedures might require different ratios of image resolution to screen frequency. It’s a good idea to check with your service provider or print shop before you scan the image.

Calculate the file size before scanning an image

You can create a dummy file to predict the file size needed for the final output of your scan.

  1. In Photoshop, choose File?> New.
  2. Enter the width, height, and resolution of your final printed image. The resolution should be 1.5 to 2 times the screen frequency you will use to print. Make sure that the mode you plan to scan in is selected. The New dialog box displays the file?size.

    For example, suppose you want the final image to be 4 inches wide and 5 inches high. You plan to print it with a 150?line screen using a 2:1 ratio, so you set the resolution to 300. The resulting file size is 5.15 MB.

    To produce the scan, enter the resulting file size in your scanner settings. Don’t worry about resolution or image dimensions. After you have scanned the image and imported it into Photoshop, use the Image Size command (with the Resample Image option deselected) to enter the correct width and height for the image.

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