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.
Troubleshooting Garage Door Adjustment Problems. In this series of articles on 'Adjusting Garage Doors' we discussed practical adjustments that you can make. The easiest thing to adjust is the garage door track. It keeps the door aligned in two ways. The tracks guide the door as it goes up and down. Either by lifting or via a garage door opener. The track also keeps the door in alignment against the weatherstripping. Slots in the brackets make adjusting the track fairly straightforward. If you need to review the topic on 'Adjusting a Garage Door Track', you can follow this link.