From the top toolbar, click the "View" and you will see the following two options:
1)Display Settings: you can adjust the display setting here to determine whether these elements are displayed or not displayed under the design interface or the canvas. Please be aware that all the settings here will only affect the view under the design interface to facilitate detailed design, and all the models (except for those that are hidden) will still appear in the rendering.
2)Hidden Items: You can manage the hidden items here. You could show all hidden items at once, or show some hidden items by ticking or unticking the item list. Noted that the hidden items will not be displayed in the view, nor will they be rendered.
