When you want to search for a code in the HTML editor, click inside the editor and press CTRL + F on your keyboard, then enter what you want to find in the search box that appears inside the editor.
Finally, hit the "ENTER" button on your keyboard and it should take you to the requested code.
If you want to be taken to the section of code that belongs to a particular widget, just click on the Jump To Widget button at the top of the editor, choose the widget's name from and it will take you directly to that portion of code.
The CSS rules can be found folded at the top of the template, between and tags. To expand them, you have to click on the sideways arrow next to the line number
Another great functionality is that now we can Preview Template in the same window without needing to leave and we can easily go back to customize our template by clicking on the Edit Template button.
Finally, Format template re-orders the code, adding indentation automatically.
As always, we must use the Save button for the changes to take effect or we can Revert the changes.
And that's it. With a bit of effort, we can easily familiarize with this new HTML editor. Surely as usual and even reasonable to be something inherent in the human condition, this change does not appeal to many. Same with the Lightbox for images, the new template designer, the new desktop and other new things that have been added in the past.