Optimized Select this option to merge single pixels into similar colored areas. This can produce smaller file sizes. However, in images with fine lines or detail, this can reduce the image quality. This option is less effective when Dither is also selected and an image has a limited number of colors. Dither Select this option if you want Canvas to use dithering to simulate a greater range of colors. Dithering can make an image appear to have more colors than are in a limited color palette, but it can also make an image appear grainy or noisy. To control the amount of dithering, enter a percentage from 1 to 100 in the text box. Interlaced Select the Interlaced checkbox to save the image as an interlaced GIF. Interlacing divides the image data for faster initial display in web browsers that support interlaced GIF images. In other words, the image appears progressively on the web page. Selecting transparent colors The Dropper tools in the Export Preview dialog box let you make colors in a GIF image transparent. Click in the color palette or the current preview image to select colors for transparency. When you select a color, it becomes highlighted in the grid. Use the regular dropper to select one transparent color. If you click another color, it replaces the current transparent color. Use the add/subtract dropper to select additional colors to be transparent. Each color you click becomes transparent. To restore a transparent color, click it again. A checkerboard pattern appears in areas of the preview image that are transparent. Color palette The area below the GIF options shows the current color palette for the image. The palette changes when you change the Palette or Max Color option. Saving settings You can save the current options in the Export Preview dialog box, and then apply the same setup to other images. To save the current options in the dialog box, choose Save Setting in the pop-up menu above the current preview pane. Type a name for the saved setting and click OK. This setting will be available in the pop-up menu above each preview pane.
Canvas 8 Help: File and data exchange (21 of 34)                                                    Page #165