More Spelling Options in PowerPoint 365 for Windows

While it is indeed easy to spell check your entire presentation for any misspelled words, other options exist to help check your slides for spelling errors.

Here are some tips to spell check your text content better in PowerPoint 365 for Windows:

1. Create a new presentation, or open an existing presentation. Go to a slide that has a spelling mistake, or if you cannot find one, you can type in a word with a spelling mistake. You'll notice that whenever PowerPoint encounters a spelling error, it highlights the misspelled word by placing a red squiggly line to underline the word, as shown highlighted in red within Figure 1, below.
2. 
   Figure 1: Red squiggly lines indicate spelling errors
2. Now, right-click the word that's underlined with the red squiggly line. Doing so brings up a contextual menu that offers one or more suggestions to replace the wrong word, as shown highlighted in red within Figure 2, below. To accept any of these suggestions, just click on the relevant suggestion. PowerPoint then replaces the misspelled word with the suggested word you chose.
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   Figure 2: Right-click menu with spelling suggestions
4. In addition, you will also find more options at the bottom of this contextual menu, as shown highlighted in blue within Figure 2, above:

Ignore All

5. This option ignores spell check for this word in your entire presentation, but only during the currently active session. If you shut down PowerPoint, reopen this presentation, and do another spell-check, then the Ignore All choice will have no impact, and will need to be chosen again.

Add to Dictionary

6. Using this option, you can quickly add this word to PowerPoint's custom spelling dictionary. You will never be prompted to correct this spelling again. Do note that PowerPoint shares the same dictionary with other Microsoft Office programs such as Word, Outlook, and Excel. Thus, those programs will also consider the new spelling as acceptable.
3. PowerPoint's spell checker does not check for spelling errors in charts and any other inserted objects because charts are instances of Microsoft Excel working behind the scenes. PowerPoint only spell checks content that is part of PowerPoint.
4. Fortunately, PowerPoint does spell check any text within text placeholders and text boxes on your slides. It also looks for spelling errors in text contained within tables, SmartArt, slide notes, and shapes. Remember though, that you must always manually check all spellings within charts!
4. Everything on your PowerPoint slide is larger than life. A spelling error within a 20-page Word document may go unnoticed but the same misspelled word in 44 pt. size as a title of your PowerPoint slide will attract a disproportionate amount of attention, making the slide and the presenter look unprofessional. Make sure you spell-check all your slide content before you present!