The help > search menu is the thing I miss the most from Mac OS since I switched to windows. Especially in programs like Photoshop where there are dozens of nested dropdowns, hitting cmd + ?, typing a few characters, and hitting enter is such a huge boost to productivity when you haven't memorized all of the keyboard shortcuts, and it even works on menu items that don't have a shortcut. The Microsoft office suite has this functionality as well, and I really wish they would integrate it at the system level like Mac OS does.