Hi Agarwal,It' Simple follow below steps.To re-enable the option Open in
Classic UI in the Page Information menu, follow these steps.Using CRXDE
Lite, find the following node:
/libs/wcm/core/content/editor/jcr:content/content/items/content/header/items/headerbar/items/pageinfopopover/items/list/items/classicuiFor
examplehttp://localhost:4502/crx/de/index.jsp#/libs/wcm/core/content/editor/jcr%3Acontent/content/items/content/header/items/headerbar/items/pageinfopopover/items/list/items/classicuiUs...