Do any of the following:
Select one or more characters: Click in front of the first character then drag across the characters.
Select a word: Double-click the word.
Select a paragraph: Triple-click in the paragraph.
Select a range of text: Click in front of the first character, then hold down the Shift key on your keyboard and click at the end of the text you want to select. You can select just a few characters or a large amount of text across paragraphs.