Where can I add CSS to the page I\'m viewing? I don\'t want to add style to one element directly, I want to add a \'document\' to a page to debug changes before editing the
Is this what you're after?: "How to Edit Source Files Directly in Chrome" http://www.sitepoint.com/edit-source-files-in-chrome/
From that article:
Step 1: Launch Developer Tools. Go to View -> Developer -> Developer Tools. Navigate to "Sources"
Step 2: Click the Filesystem tab, then click + Add folder to workspace. You’ll be prompted to locate your work folder and Chrome will ask you to confirm that you Allow access.
Step 3: Edit and Save Your Code and refresh the browser to see your changes