The browser preview shows dimensions, file size, number of colors and possible download times for 14.4K to 128K modems. A major reason that designers have had to switch between various applications is a lack of good support for Web graphic formats. Xara lets you select an output file type and then adjust image size and bit depth to reduce the image's final size. You can also preview the image in your preferred browser. Xara lets you apply dithering, interlacing and transparency, although there's no way to specify a color other than white.
Color palettes are limited to browser or optimized colors.
Compared with Fireworks and ImageReady, Xara's export feature is a little on the light side. Only one file type at a time can be previewed in the optimization screen. And you can't switch file formats once you've made your selection. Xara is a very effective illustration program and already has a loyal following. The Web features are a nice addition for the money and will certainly make it easier for current Xara users to design for the Web.