22 SELECTION TECHNIQUES
After selecting the tool, click-drag to draw a marquee on the image surface.
Hold down the Shift key whilst drawing to restrict the shape to either a square or a circle. Hold down the Alt (Windows) or Option (Mac) key to draw the shape from its center. Hold down the Spacebar to reposition the marquee.
After selecting the tool, click-drag to draw the selection area by freehand. Release the mouse button ...
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