Other users' browsers may display them differently depending on many factors. Keep in mind that the purpose of HTML is to define the structure of the content, not the layout. The appearance will be determined by the user's browser or a style sheet. Most browsers display each level header in a different size with H1 being the largest. Headers appear on a line by themselves with a blank line above and below.
Text contained within blockquotes appears indented from both margins of the page as shown below.
Now we are engaged in a great civil war, testing whether that nation or any nation so conceived and so dedicated can long endure. Describes the look of the content between the tags. Note that in HTML 4.0, FONT is deprecated.