Menus are sometimes hierarchically organized, allowing navigation through different levels of the menu structure. Selecting a menu entry with an arrow will expand it, showing a second menu (the sub-menu) with options related to the selected entry.
Torsion springs are normally mounted horizontally above the opening of your garage door. When you pull the door down, cables attached to the bottom corners actually force the springs to wind up, in turn energizing the system.
Originally Posted by Chango. The spring on my (2 car garage) door snapped this weekend. It's one of those large torsion springs, like this one: Garage Door Torsion Spring Replacement. I'm usually a religius DIY devotee, but I'm not sure I want to tackle this one.