Type the following text in Writer - "This is a new document.The document deals with find and replace".
Now "Find and Replace" the word "document" in your text with the word "file".
Replace the word "text in your document with the spelling t x t"
Use the Spellcheck feature to correct the spelling to "text".
Use English(USA) as your default language.
Using the AutoCorrect feature, create an abbreviation for the text "This is LibreOffice Writer" as "TLW" and see its implementation.