Subtabs create a hierarchy inside a Google Doc. Use them when a large topic contains several substantial parts, such as a research tab with separate interview and analysis subtabs.
Add a subtab under the intended parent
- Open Show tabs & outlines in the document.
- Find the parent tab.
- Open its Tab options menu and choose Add subtab.
- Rename the new subtab with a meaningful label.
You can also turn a tab into a subtab by dragging it onto another tab. Inspect the resulting indentation so you know which parent now contains it.
Keep the hierarchy shallow and useful
Google supports nesting up to three tab levels. A supported maximum is not necessarily a good design target. Deeply nested material can become difficult to find, especially when several tabs have similar names.
Use document headings for smaller subdivisions within a tab instead of creating another structural layer unnecessarily. A reader should be able to predict where information belongs from the parent and child names.
Verify content and sharing assumptions
Click the parent and each new child to confirm that the contents are where expected. Moving or nesting a tab is a structural action, so verify the destination before continuing other edits. These actions require editing mode and appropriate access.
Subtabs remain within the same document. They do not establish private areas for selected collaborators. If material needs a different access audience, use an appropriately controlled separate document instead. Finally, check download and print scope; the presence of a nested structure does not remove the need to choose and verify which tabs the output includes.
References
Reviewed against the linked official product guidance on November 3, 2026. Features, limits, screen labels, and access can vary by account, platform, region, and organization policy.