Bryan O'Neil Hugheshttp://www.photoshop.com/people/bryan
This document outlines the different methods you can use to adjust your image's cropping, rotation, and canvas size.
The Trim command crops an image by removing unwanted image data in different ways than the Crop command. You can crop an image by trimming surrounding transparent pixels, or background pixels of the color you specify.
You can place several photos on your scanner and scan them in one pass, which creates a single image file. The Crop and Straighten Photos command is an automated feature that can create separate image files from the multiple-image scan.
For best results, keep 1/8 inch between the images in your scan, and the background (typically the scanner bed) should be a uniform color with little noise. The Crop and Straighten Photos command works best on images with clearly delineated outlines. If the Crop and Straighten Photos command cannot properly process the image file, use the Crop tool.
If the Crop And Straighten Photos command incorrectly splits one of your images, make a selection border around the image and some background, and then hold down Alt (Windows) or Option (Mac OS) as you choose the command. The modifier key indicates that only one image should be separated from the background.
The Ruler tool provides a Straighten option that quickly aligns images with horizon lines, building walls, and other key elements.
Select the Ruler tool . (If necessary, click and hold the Eyedropper tool to reveal the Ruler.)
In the image, drag across a key horizontal or vertical element.
In the options bar, click Straighten.
Photoshop straightens the image and automatically crops it. To reveal image areas that extend beyond the new document boundaries, choose Edit > Undo.
To entirely avoid automatic cropping, hold down Alt (Windows) or Option (Mac OS) when you click Straighten.
Image Rotation is destructive editing and actually modifies the file information. If you want to non-destructively rotate the image for viewing, use the Rotation tool.
The Image Rotation commands let you rotate or flip an entire image. The commands do not work on individual layers or parts of layers, paths, or selection borders. If you want to rotate a selection or layer, use the Transform or Free Transform commands.
A. Flip Horizontal B. Original image C. Flip Vertical D. Rotate 90° CCW E. Rotate 180° F. Rotate 90° CW
Rotates the image by a half-turn.
Rotates the image clockwise by a quarter-turn.
Rotates the image counterclockwise by a quarter-turn.
Rotates the image by the angle you specify. If you choose this option, enter an angle between ‑359.99 and 359.99 in the angle text box. (In Photoshop, you can select °CW or °CCW to rotate clockwise or counterclockwise.) Then click OK.
Flip Canvas Horizontal or Vertical
Flips the image along the corresponding axis.
The canvas size is the full editable area of an image. The Canvas Size command lets you increase or decrease an image’s canvas size. Increasing the canvas size adds space around an existing image. Decreasing an image’s canvas size crops into the image. If you increase the canvas size of an image with a transparent background, the added canvas is transparent. If the image doesn’t have a transparent background, there are several options for determining the color of the added canvas.
You can also click the white square to the right of the Canvas Extension Color menu to open the Color Picker.
The Canvas Extension Color menu isn’t available if an image doesn’t contain a background layer.
You can make a photo frame by increasing the canvas size and filling it with a color.
You can also use one of the prerecorded actions to make a styled photo frame. It’s best to work on a copy of your photo.
The action plays, creating the frame around your photo.