ding around 0.5
Megabytes of data and uploading 0.06 Megabytes.
</div>

<span class="question-heading" id="opt_in_out">How can I opt in/out?</span>

<div class="answer">
To change your participation in this research, in BlueJ 3.1.0 and later, go to
the Preferences window, and under the Miscellaneous tab there is an option to
change your current participation.
</div>


<span class="question-heading" id="repeated">Why do I repeatedly get asked if
  I want to opt in?</span>

<div class="answer">
<p>
Your parti