Web authoring software has a number of common features to allow you to create pages efficiently.

• WYSIWYG – What you see is what you get. Web authoring software allows you to see your page as it would appear in a browser, often used with a live preview.
• Views – Most web authoring software provides multiple views of the web page you’re working on.
  • Standard, normal, or design view – This is typically the default view, which is a blank screen on which you type, paste, or insert content. This is very similar to a word processor screen.
  • Code view – Allows you to view and work directly with the HTML code.
  • Split – Both of the above views are displayed simultaneously in separate windows.
• Links – Web  authoring packages allow you to insert internal and external hyperlinks on the selected items
• Headings – Selected text can be formatted as a heading or subheading with a click of the correct icon.
• Images – graphics can be inserted and often editing from within web authoring software.
• Code generation and completion – as the text or image is formatted, tags are automatically added to the code and closed when required.

You can have a more detailed look at some of these features on this web site.