There’s a new understanding that has evolved over the past few years about making all sorts of computer generated content accessible to people with disabilities. PowerPoint is no stranger to this accessibility concept, and has many options up its sleeve that help your slides be more relevant to those with accessibility impairments. Just like how PowerPoint’s spell checker alerts you to potential spelling errors, the built-in Accessibility Checker highlights potential accessibility issues in your presentation so that you can fix these potential problems and make your content accessible to everyone. Note that fixing some issues might require that you change, reformat or otherwise update your content. In addition, the Accessibility Checker also lets you know about application features that you can use to make your content more accessible.
Learn how to check accessibility for your presentation in PowerPoint 2010 for Windows.

