Stopping a quick style?

[jarvis24]

[edited from support email]
We've been using the quickstyle parameter in our questionaires to change the size of the font of lengthy questions. However, we only want it to those specific questions. When I add the quickstyle to the parameters and run the questionaire, the font applies to all questions that follow, even after I tried adding a different (larger) quickstyle to the next question. Is there another way to change the font of a single question?