To subtract from a selection:  Command-click (Mac) or Ctrl- click (Windows) the Wand in the image. The pointer displays a wand with a ‘-’ to show that it subtracts from the current selection. To adjust the tolerance of the Wand tool You can broaden or narrow the range of colors the Wand tool selects by adjusting its tolerance. A tolerance of zero, for example, selects pixels that exactly match the color of the pixel you click. To configure the Wand tool:  Double-click the Wand tool icon. In the Wand dialog box, type a tolerance value from zero to 255. To smooth the edges of the selection, turn on the Anti-Aliased option. Selecting a color range You can use the Color Range command to select all areas of similar color in an image. The command creates a grayscale selection mask similar to an alpha channel. You can use the Load and Save buttons in the dialog box to work with color range selection files. The file format that Canvas uses for these files is compatible with Photoshop Color Range files. On Win- dows, these files use the extension AXT. To select a color range interactively 1 With a paint object in edit mode, choose Image > Select > Color Range. 2 In the Color Range dialog box, choose Sampled Colors in the Select pop-up menu. 3 Adjust the Fuzziness setting. To select pixels of exactly the same color, set the Fuzziness to zero. Increase the Fuzziness to widen the range of colors to be selected. 4 Click a color in the preview image in the dialog box. Canvas selects a range of similarly colored pixels, depending on the Fuzzi- ness setting. •   To add colors to the selection, click the ‘+’ dropper icon, then click a color in the image in the dialog box. •   To subtract colors from the selection, click the ‘-’ dropper icon, then click in the image in the dialog box. 5 To view the selected pixels, click the Selection option. Gray areas indicate pixels that the Color Range command selects at a reduced opacity. Filters and painting tools affect these areas to a
Canvas 8 Help: Selections and channels (5 of 32)                                                    Page #655