<p>It is not possible yet to save drafts on multiple questions or answers, but it is possible to do that with one question and with one answer, since <a href="https://meta.stackexchange.com/questions/59445/recent-feature-changes-to-stack-exchange">2010-10-01</a>. More details on this <a href="https://meta.stackexchange.com/questions/1177/allow-questions-to-be-saved-as-drafts-prior-to-posting">Meta SE thread</a>.</p>

<p>Basically, each user gets one draft for questions and one for answers, and the answer draft is cleared if the user posts a new answer (the same for questions). Drafts expire in one week.</p>

<p>It is also possible to <a href="https://meta.stackexchange.com/questions/68957/manually-clear-saved-question-drafts/126299#126299">discard drafts</a> if someone wishes to do so.</p>
