Adobe 13101332 User Guide - Page 161

Adobe Photoshop Help Using Help | Contents | Index Selecting Back 161 • To specify the lasso's sensitivity to edges in the image, enter a value between 1% and 100% for Edge Contrast. A higher value detects only edges that contrast sharply with their surroundings; a lower value detects lower-contrast edges. • To specify the rate at which the lasso sets fastening points, enter a value between 0 and 100 for Frequency. A higher value anchors the selection border in place more quickly. On an image with well-defined edges, try a higher width and higher edge contrast, and trace the border roughly. On an image with softer edges, try a lower width and lower edge contrast, and trace the border more precisely. • To change the lasso cursor to indicate the lasso width, press the Caps Lock key on the keyboard. Change the cursor while the tool is selected but not in use. • If you are working with a stylus tablet, select or deselect the Stylus Pressure option. When the option is selected, an increase in stylus pressure will cause the edge width to decrease. While creating a selection, you can press ] to increase the magnetic lasso edge width by 1 pixel; press [ to decrease the width by 1 pixel. Using the magic wand tool The magic wand tool lets you select a consistently colored area (for example, a red flower) without having to trace its outline. You specify the color range, or tolerance, for the magic wand tool's selection. Note: You cannot use the magic wand tool on an image in Bitmap mode. To use the magic wand tool: 1 Select the magic wand tool . 2 In the options bar, specify whether to add a new selection , add to an existing selection , subtract from a selection , or select an area intersected by other selections . The magic wand cursor changes depending on which option is selected. 3 For Tolerance, enter a value in pixels, ranging from 0 to 255. Enter a low value to select colors very similar to the pixel you click, or enter a higher value to select a broader range of colors. 4 To define a smooth edge, select Anti-aliased. (See "Softening the edges of a selection" on page 166.) 5 To select only adjacent areas using the same colors, select Contiguous. Otherwise, all pixels using the same colors will be selected. 6 To select colors using data from all the visible layers, select Use All Layers. Otherwise, the magic wand tool selects colors from the active layer only. 7 In the image, click the color you want to select. If Contiguous is selected, all adjacent pixels within the tolerance range are selected. Otherwise, all pixels in the tolerance range are selected. Using the Color Range command (Photoshop) The Color Range command selects a specified color or color subset within an existing selection or an entire image. If you want to replace a selection, be sure to deselect everything before applying this command. Using Help | Contents | Index Back 161