Checking Spelling and Grammar
From LibreOffice Help
You can manually check the spelling and grammar of a text selection or the entire document.
The spellcheck starts at the current cursor position, or at the beginning of the text selection.
- Click in the document, or select the text that you want to check.
- Choose Tools - Spelling and Grammar.
- When a possible spelling error is encountered, the Spellcheck dialog opens and LibreOffice offers some suggested corrections.
- Do one of the following:
To accept a correction, click the suggestion, and then click Correct.
Edit the sentence in the upper text box, and then click Correct.
To add the unknown word to a user-defined dictionary, click Add to Dictionary.