A question theme is a variant of a question type with its own look. In the editor, question themes are listed with the question types: for example List image select (Radio) and Single choice buttons under Single choice, Multiple choice buttons and Image select multiple choice under Multiple choice.
A question theme changes one question. To change the look of the whole survey, use the theme options of the survey.
Administrators find the question themes of the survey site under Configuration > Advanced > Themes, on the Question themes tab. The list has one entry for each question type plus the variants. Extends shows the code of the question type a variant builds on, for example L for List (radio). Visibility switches each theme On or Off.
No. A question theme changes one question. To change the look of the whole survey, use the theme options.
Check its Visibility on the Question themes tab under Configuration > Advanced > Themes. Visibility switches each theme on or off.
Yes. Click Upload & install at the top of the Themes page and select the theme ZIP file, up to 40 MB.