Show or Hide Elements
You can see all of the hidden widgets on a page by clicking the Unhide Elements (eye) icon. In Classic Editor, the Unhide Elements icon is at the bottom of the left panel.
The Unhide Elements icon only displays if you have hidden elements in your site. When using the Unhide Elements feature, it only unhides or shows them on the device/screensize you are currently editing.
Note
If content is hidden, it will still show up in the HTML of a site as there currently isn’t a way of removing it. Search engines should be aware of this and ignore hidden items (for instance if there are multiple H1 tags, but only one can be seen by visitors, search engines should only detect the visible H1). For more information, see Site Performance and Optimization.