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Photoshop
Photoshop
• What is Photoshop?• An image editing program used to create and
modify digital images
• What is a digital image?– A picture in an electronic form
Application bar
Tools panel
Workspace options
Thumbnails of minimized panels
Expanded panels
Zoom controls
Layers panel
Workspace
TOOLS
Zoom Tool• Used to enlarge and reduce the image on your
screen• Three ways to ZOOM IN
• Choose the Zoom tool• Press Z• Type a magnification value
• Three ways to ZOOM OUT• Release the Z• Type a magnification value• Choose Zoom out from the VIEW menu
CROP TOOL
• Cropping an image is a basic task in which you define an area of an image that you want to keep and then discard the remainder of the image.
• Two ways to CROP– Image>Crop– Use the Crop Tool
To cancel the crop, hit ESC.
UNDO
• Three ways to UNDO an action– CTRL + Z– File, Revert– History Panel
Resolution
• A bitmap graphic is a graphic composed of pixels. The word pixel is derived from the words picture and element. A bitmap image is a grid of pixels.
• Photoshop images are bitmap graphics.• Resolution is a measurement: the number of
pixels per inch (ppi).
Image Size and File Size
• Image Size refers to the physical dimensions of the image – width and height.– 8 x 10– 5 x 7
• File Size refers to how big the file is in computer memory – how much storage space it takes up on your computer– 42 MB (megabytes)
Standard File Formats for Photoshop Files
File Format Extension Use
Bitmap .bmp Bitmap images, popular with Windows operating systems
CompuServe GIF .gif Web graphics
Photoshop EPS .eps Photoshop graphics with shape layers or live type
Photoshop PSD .psd Basic format for all Photoshop documents
JPEG .jpg, .jpeg Web graphics, images to be e-mailed
PICT .pct, .pict Graphics to be used in presentation programs, such as Powerpoint
Portable Network Graphics .png High-quality Web graphics
Tagged Image Format .tif, .tiff Graphics to be used for print in page layout programs