You can separate your code into different tabs, for example you can edit your main page on one tab and script on another,write CSS in another,etc..,etc.., plus you can view the output of your code by pressing the Alt key instantly, and among a host of other useful features it has a programmable context menu and WYSIWYG interface.

Note: Execute Install.reg to properly install this program, only takes a couple seconds to do, otherwise you´ll get errors here and there at startup.