If you'd like to change the size of the text in your document, use the cursor to highlight all of the text you want to change. When the menu bar pops up, click on H1, H2, or H3. H1 will make your text headline-sized, H2 will make your text normal-sized, and H3 will make your text smaller than usual. If you change your mind, hit Control and Z twice to undo the changes you've made.