Select one of the Marquee Tools by clicking and holding on the tool, then sliding over and down to the correct selection. Marquee Tools : The Marquee Tool allows you to make a selection using a rectangle, ellipse, or rows. – and then preview what it would look like against different backgrounds. You can adjust the edges of your selection – sharpen or blur, smooth the transition, etc.
In addition, there is a Refine Edge button in each selection tool Options Palette (see the Marquee Tool and Feathering Exercise for a picture of this dialog box). All selection tools can be combined to create exact selections using the Shift key or Alt key ( Option key on the Mac), to add or subtract respectively (see below for more tips). The selected area is then outlined with a dotted line, what we refer to as “dancing ants.” The Selection Tools allow you to select portions of the image either by location or by pixel color, and thus apply Photoshop’s editing power in specific areas. To modify a portion of your image you need to select it first – everything outside the selected area is then protected from change.