Things You'll Need:
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Step 1
Start Adobe Photoshop and open an existing image on which you can practice altering the background.
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Step 2
Select the Single Column Marquee tool from the Photoshop toolbox. It is the top left button. You will have to hold down your mouse on the Marquee button until you get a submenu from where you can select "Single Column Marquee." After selecting "Single Column Marquee," you should see a blinking vertical line on your image.
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Step 3
Go up to the "Edit" menu and select "Free Transform" to transform your background.
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Step 4
Click on the square in the middle of the vertical line and drag it either to the left or to the right.
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Step 5
Select another marquee tool and draw a shape with it on your image, using your mouse to click and drag until you get the size you want.
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Step 6
Choose "Free Transform" from the "Edit" menu so you can use the marquee to transform your image again.
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Step 7
Grab a hold of any of the squares on your marquee and drag them different ways to get different results.







