Translations:Theme editor/42/en
From LimeSurvey Manual
In the "file control" window on the left, you can click one of the template files that is used to compile the page. You can see the Screen part, JavaScript, and CSS files. The HTML code for that file will then appear in the "Now editing" window in the center. If the template is editable (determined by directory permissions) you can then make any changes and save them.