How to Use Preview Like a Pro in Mac OS X 10.6
If you are thinking of buying Photoshop or another expensive photo editing program, first consider a program built right in to your Mac. If you are buying Photoshop so you can take the background out of a photo, highlight a certain part of...
Method 1 of 3:
Taking the background out of images
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Open Preview. -
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Use Preview to open your image. Go to File>Open and choose the image you wish to open. -
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Click the "Select" drop-down menu. -
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Choose the "Instant Alpha" button. -
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Click wherever you want to erase the background. -
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You will notice that part of your picture turns red. -
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Drag until most of your background is red. -
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When you have most of the background selected, hit the "Delete" key. -
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This won't erase all of the images background, but it should get most of it. -
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Now it comes down to personal preference on which tool to use to clean up the rest of the background.
Method 2 of 3:
Isolating a part of a picture
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Drag a rectangle (or circle if that's what you want) around the area you want to keep. -
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Hit the "Invert Selection" button under the "Edit" menu. -
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Hit "Delete"
Method 3 of 3:
Annotating on a Picture/PDF
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Open your picture. -
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Hit the "Annotate" button -
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Make your selections!
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