Launch the editor
Note that the top icon on right is to preview on the right the generated output.
You can click the save button on top left to save your script to a generated web URL.
Double click a file name on left to rename it, click x icon to delete a file , or click the add file hyperlink to add a file.
There is preview button on right for a large display of the displayed output.
Check mark button on the right is for lint integration.
Th gear icon is personal seetings like font and auto-refresh which runs the script again at interval selected . Or turn auto-refresh off.
Right click on console and click options to clear console
To debug go in the sources tab.
ctrl-o to open your js file by entering file name in the input box.
debugging resume f8