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.
Extension springs are located above the tracks on both sides. The type on my garage were torsion springs, which are located above the garage door opening. Torsion springs are much harder to remove and replace than extension springs. (Learn about removing extension springs in this article. Danger is not the only reason to let a pro replace your torsion springs.