The invention is a method for adjusting a keyboard support assembly from a storage position under a support surface to a use position. A keyboard tray is extended in a direction generally parallel to and past the support surface. A first side arm is translated in a direction generally parallel to the support surface. A front portion of the first side arm is attached to the keyboard tray at a front attachment point. A front sliding member portion of the first side arm and a rear sliding member portion of the first side arm is slid along a rail. The rail is fixably mounted to a mounting surface. A positioning surface of the first side arm is engaged with a positioning mechanism fixed to the mounting surface. The front portion of the first side arm is forced to rotate the first side arm about a pivot point in the rear sliding member due to the engagement of the positioning surface with the positioning mechanism. The keyboard tray is translated in an upward direction.