public void OnEnable() { var root = this.rootVisualElement; root.style.paddingTop = new StyleLength(10f); root.style.paddingBottom = new StyleLength(10f); root.style.paddingLeft = new StyleLength(10f); root.style.paddingRight = new StyleLength(10f); UnityEngine.UIElements.Toggle hideSliderBool = new Toggle("Hide Slider!"); root.Add(hideSliderBool); var label = new Label(0.ToString()); root.Add(label); SliderInt slider = new SliderInt(); root.Add(slider); // Add slider as a child of root. slider.RegisterCallback <ChangeEvent <int> >(evt => { label.text = evt.newValue.ToString(); }); hideSliderBool.RegisterCallback <ChangeEvent <bool> >(evt => { // You want to easily hide/show dynamically... if (hideSliderBool.value) { slider.style.display = UnityEngine.UIElements.DisplayStyle.None; } else { slider.style.display = UnityEngine.UIElements.DisplayStyle.Flex; } }); // Or, once you're done with this element. Make it go away. //Button removeSliderButton = new Button(Hej); Button removeSliderButton = new Button(() => slider.RemoveFromHierarchy()); removeSliderButton.text = "Remove Slider?"; root.Add(removeSliderButton); // Add slider again Button addSliderButton = new Button(() => root.Add(slider)); addSliderButton.text = "Add Slider?"; root.Add(addSliderButton); }