I like to use Eclipse\'s shortcut Ctrl + O which outlines the current source. Is there an equivalent shortcut in IntelliJ IDEA?
It opens a dial
For Intellij 13 on ubuntu the shortcut for the Structure window is Alt+7 (Cmd+7 on Mac). You can make the window floating to simulate the Eclipse behavior using the top-right setting icon, also unselect the pinned mode option for Esc to work.