The purpose of these formatting features is only to improve the appearance of the document during the editing process. PRO do not affect how browsers format the document. Only the markup affects how a document looks in a browser. Because HTML files are structured documents, setting a style for an element means setting it for all elements of that type. By choosing the right and left indent, you can set the line length for the element.
Block elements start and end on a separate line from adjacent content.
Inline elements are not set off from adjacent text. You can change the format assigned to an element in the document at any time. If the insertion point is outside the HTML element that surrounds the entire document, the dialog box lets you set the default format. If you move the insertion point to a different element while the Styles dialog box is on the screen, the dialog box changes to reflect the formatting of the new element. The Styles dialog box allows you to enter numerical values for font size, line height, space above and below, and indention.