Click this button and move the mouse cursor over any element in the browser window and this element will immediately be highlighted in the Elements tab.
In this tab, you can analyze and modify the DOM of the current tab - change the HTML code of elements (remove or add attributes), you can cut out some of the elements.
This window can be used to test XPath queries: open the Elements tab, press the key combination Ctrl + F, a field for entering a search phrase (1) will appear at the bottom of the window (you can enter simple text, XPath, CSS Selectors). Found items will immediately be highlighted (2).
All requests that were sent when loading this page will be displayed here. This can be very helpful when writing custom queries.