Imagine this scenario: you have created a specialized, medical presentation that’s full of squiggly, red, underlined words! These squiggly underlines indicate what PowerPoint considers to be as a misspelled word! Don’t blame PowerPoint, because its medical terminology is somewhat limited. We do know that almost all the words in your medical presentation are perfectly valid as far as spelling is concerned. The silver lining here though is that you can teach PowerPoint to spell those words, and enhance PowerPoint’s custom dictionary.