Defining the Crop from the Center of a Document

Sometimes you need to shave off equal amounts of excess content around the four sides of your image. You could do it by using the Measure tool to set guides, draw a marquee with the Crop tool or the Rectangular Marquee tool, make sure it snaps to the guides, and then crop. Problem is, that makes it difficult to judge visually how much content needs to be cropped. What you can do instead is use the technique outlined previously for adding canvas size.

1. Check that the options View^ Snap and View^ Snap To ^ Document Bounds are selected.

2. Select the Crop tool and ensure that the text fields are clear on the options bar (if need be, click the Clear button).

3. Draw a crop marquee and let it snap to the document bounds.

4. Hold down Alt+Shift (Windows), Opt+Shift (Mac OS) and transform the crop by one of the four corner points (Figure 11-3).

5. Double-click in the crop marquee to commit the crop, or press Enter (Windows), Return (Mac OS).

If you find that the crop marquee is not transforming evenly around the axis, make sure that the option Perspective is not selected.

TIP When drawing a crop marquee, you are not restricted to defining a crop from the point where you first click with the mouse. You can define any point as the center of your crop (this is true of all marquees that can be constrained). To do so, select the Crop tool, hold down Alt (Windows), Opt (Mac OS), click the canvas, and then define your crop marquee. You can press Alt (Windows), Opt (Mac OS) at any time after you have started to define the crop, as long as you do it before you have lifted the pointer off the canvas.

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