1. Use props: During the live broadcast, you can use some props to help you slim down and lengthen your long legs. For example, you can use some mirrors or wide-angle lenses to help you adjust your posture and make your legs look longer and thinner.

2. Adjust the angle: By adjusting the relative position and angle between the camera and the body, you can make the legs look longer. Generally speaking, putting the camera on one side of the body and tilting it slightly can better show the leg lines.

3. Wear and match: Wear and match is also very important. You can choose high-waisted pants, loose tops, etc. to cultivate your body and show your legs.

4. Use of light: Light is also one of the factors that can help you slim down and stretch your legs. Choose the right light source to make the legs more prominent and the other parts of the body relatively dim.

5. Standing posture: When standing, put your center of gravity on one leg, lightly step on the ground with the other leg, and slightly bend your knees, which will make your legs look longer and thinner. At the same time, chest out and abdomen in, the upper body leans forward slightly, which can highlight the waist curve and make the overall figure look more symmetrical.

6. Lens distance: Lens distance is also very important. If the camera is too close to you, it will magnify your body defects. If the lens is too far away from you, it will reduce your body proportion, so you need to find a suitable distance to present the best effect.

These skills can help you slim down and stretch your legs in the live broadcast. Of course, these skills also need to be gradually mastered and applied by combining practice and experience. I hope the above information is helpful to you.