I have noticed, over the past several months, that more and more people are getting into website design and coding. While noticing this, new coders have been attempting to use programs like Dreamweaver to begin their coding journey. This is an absolute NO no. Dreamweaver is a product made by adobe. It has not yet been updated to handle HTML5 or CSS3 completely and will produce errors, that other editors usually will not produce.
To view your coding work, simply open the containing folder, select the page you wish to view in the browser and then open the page in the browser that you wish to preview it in. It is recommended that you leave that browser/window tab open so that you can refresh as you save your code.
Another thing that has me recommending Sublime Text 2, is the fact that you can select different skins for the program to make it easier to see the errors in your coding. Using these skins allows you to catch the missed colons and semi-colons much easier that most other text editors or programming utilities.
Below I have included a screenshot of what Sublime Text 2 looks like. You can download it for free at http://sublimetext.com/2