When you have sent out a survey, and you want to finalise your results, this is quick and easy to do.
Once you finalise a survey, all outstanding responses from recipients of the survey will no longer be able to filled out, and you can no longer send out any more requests for this survey using the current template.
On the main menu click Surveys.
On the Active tab, click on the title of the relevant survey.
A message pops up warning you that all outstanding reviews pending completion will be removed and you'll no longer be able to send out requests for feedback on this template.
The survey now shows in the Finalised tab of Surveys.
You can click on it to view its results.