Visio 2010 introduces a feature called “Live Rendering” to remedy drawing surface of Window icons shapes. Live Rendering replaces a shape’s icon with an image of what the shape actually’ll look like on the page. You can see the full color spectrum used in the gradient fills. You can see the anti-aliasing applied to the geometry and text. If there’s currently a theme applied to the page, Visio’ll even show the shape with the theme applied. Live Rendering’s also available for any of your own custom shapes. Visio 2010 takes the existing setting for automatically generating icons for shapes and repurposes it as a setting for Live Rendering. If you right-click on one of your own shapes in the Shapes Window and choose Edit Master > Master Properties, you can see the revised property.

Full Article: Visio Insights