[. . . ] The manual should be saved and kept on hand as a convenient reference. Loosen hand knobs "A" (two locations) and spread open the left and right legs of the stand as shown in the illustration. [. . . ] The specific meaning of the symbol is determined by the design contained within the triangle. In the case of the symbol at left, it is used for general cautions, warnings, or alerts to danger. The symbol alerts the user to items that must never be carried out (are forbidden). The specific thing that must not be done is indicated by the design contained within the circle. In the case of the symbol at left, it means that the unit must never be disassembled. The specific thing that must be done is indicated by the design contained within the circle. In the case of the symbol at left, it means that the powercord plug must be unplugged from the outlet. For everyday cleaning wipe the unit with a soft, dry cloth or one that has been slightly dampened with water. To remove stubborn dirt, use a cloth impregnated with a mild, non-abrasive detergent. Afterwards, be sure to wipe the unit thoroughly with a soft, dry cloth. [. . . ] You risk injury if you have loose screws or clamps, since a pad or unit can fall unexpectedly. When setting up or storing the stand, be careful not to pinch the fingers you use to handle the stand. [. . . ]