You can create and manage tabs in Google Docs to better organize your documents. With tabs, from the left panel, you can: Visualize the document structure anytime. Use the tabs as sections of a document for easier navigation. Create a tab. Important: By default, a new document has a tab called “Tab 1.” You can’t delete “Tab 1” unless …
https://support.google.com/docs/answer/15499791?hl=en&co=GENIE.Platform%3DDesktop

