Adobe Photoshop CC 2014 v.14.xx User Manual
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the selection shape constrained).
To drag a marquee from its center, hold down Alt (Windows) or Option (Mac OS) after you begin dragging.
Dragging a marquee from the corner of an image (left), and from the center of an image (right) by pressing Alt/Option as you drag
With the Single Row or Single Column Marquee tool, click near the area you want to select, and then drag the marquee to the exact
location. If no marquee is visible, increase the magnification of your image view.
To reposition a rectangle or elliptical marquee, first drag to create the selection border, keeping the mouse button depressed. Then hold
down the spacebar and continue to drag. Release the spacebar, but keep the mouse button depressed, if you need to continue adjusting
the selection border.
More Help Topics
Selection tools gallery
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