In PowerPoint 2013, the default settings can limit some of Microsoft’s helpful features. With the default settings if you type a word in lower case, spell check automatically lets us know if there is a typo. But if you type the same word in all caps, spell check is not used. Here is my example, which according to Microsoft Office only has 1 misspelled:

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The setting to change is to go to FILE >> OPTIONS >> PROOFING tab

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In the WHEN CORRECTING SPELLING IN MICROSOFT OFFICE PROGRAMS section, uncheck IGNORE WORDS IN UPPERCASE

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Now All Caps or Lower Case words are par of the spell check feature.

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– Troy @ TLC