There are no such things as "stupid" questions. However if you think your question is a bit stupid, then this is the right place for you to post it. Please stick to easy to-the-point questions that you feel people can answer fast. For long and complicated questions prefer the other forums within the support section. Before you post please read this
I keep learning something every day - the default key combo for opening the bottom menu is Ctrl-SuperL , wehre SuperL is the Windows Start key on most keyboards. You can change that combo by right clicking on the Menu button and choosing preferences.