Hold the Shift key down and watch what happens. Now hold the Option key down instead. Now hold both down at the same time. First you see a. Then release both keys.
Nothing seems to happen on the screen.
Now press e again, by itself. You can then format the symbol as you want. Use Font and Format menus to draw attention to headings and other important parts of the text. Save periodically to disk. You can use the scroll bar on the right hand side to move through the document.