How do I turn off highlighting when writing?

( LibreOffice 4.4) Windows 8 64 bit

If you would be good enough to explain how you turned highlighting ON then someone may be able to explain, billy.

I’m guessing at what you’re asking. IF by highlighting you mean spell check as you type, that can be turned off in TOOLS/OPTIONS/LANGUAGE SETTINGS/WRITING AIDS. You would still be able to run spell check within the document (TOOLS/SPELLING AND GRAMMAR, or f7).