Firebug
If you have a hard time making changes to your website, perhaps not understanding or having taken the time to learn the programming code behind it, you need to get Firebug. Firebug is a Firefox addon that lets you see what code changes would do to your blog without actually happening to your blog. It really is a great way to learn through trial and error, all the while causing no harm to your website because what you’re seeing is only a preview of what would happen if you made the changes you did. If you do decide to do this, please make a backup copy of your website and save copies of the css/html/php, etc files into a text editor such as Notepad — always better to be safe than sorry.
Think of Firebug as an upgrade to the “old school” trial and error which revolved around having a Notepad text file copy of the HTML source code and making changes to the actual website’s code. That was okay back in the day, however it’s a lot harder to see exactly where you made a mistake when elements from markup, scripting, and programming languages are present on the same website as they are today.

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