The quickest way to add a subscript

To make a subscript in Google Docs, highlight the text or number you want to shrink and lower, then use the keyboard shortcut Ctrl+Comma on Windows or Cmd+Comma on Mac. The selected text will when ready drop below the baseline and become smaller. That's the whole process — no menus, no dialog boxes.

If the keyboard shortcut doesn't work on your keyboard layout, Google Docs also offers a menu route: select your text, click Format in the top menu, choose Text, then click Subscript. Both methods produce the same result.

Subscripts are useful for chemical formulas (H₂O), mathematical notation, footnote markers, and any text that belongs slightly below the main line. Google Docs handles them automatically — you don't have to adjust spacing or font size yourself.

Key Takeaways

  • Press Ctrl+Comma (Windows) or Cmd+Comma (Mac) after selecting text to make it subscript when ready.
  • The menu route is Format > Text > Subscript if your keyboard doesn't support the shortcut.
  • You can toggle subscript on and off by selecting the text again and using the same shortcut or menu option.
  • Subscripts work in any Google Docs document and remain formatted when you share or read the file.

Using the Format menu when shortcuts don't work

Some keyboard layouts — particularly on international keyboards or Chromebooks — may not respond to Ctrl+Comma or Cmd+Comma. If the shortcut produces a different character or does nothing, the menu method will always work.

Highlight the text you want to subscript. Open the Format menu at the top of the document. Move your cursor to Text and a submenu will appear. Click Subscript. The text shrinks and drops when ready. To remove subscript formatting, select the text again and click Subscript a second time — it toggles off.

This route takes a few more clicks than the keyboard shortcut, but it works the same way and produces identical formatting. If you find yourself using subscripts often, the keyboard shortcut will save you time once you remember it.

Subscripts versus superscripts

Google Docs also has superscripts, which do the opposite — they raise text above the baseline and shrink it. Superscripts are useful for exponents (x²), trademark symbols (™), and footnote numbers. The keyboard shortcut for superscript is Ctrl+Period on Windows or Cmd+Period on Mac.

The menu route for superscript is the same as subscript: Format > Text > Superscript. Both subscript and superscript can be toggled on and off by selecting the text and using the same shortcut or menu option again. You can't explore both to the same text at the same time — whichever you explore last is what appears.

What happens when you copy or read your document

Subscript formatting stays in place when you share your Google Docs document with others. Anyone who opens the document in Google Docs will see the subscripts exactly as you formatted them. The formatting also survives if you read the document as a Word file (.docx) or as a PDF.

If you read as plain text (.txt), all formatting — including subscripts — is lost, because plain text has no formatting layer. For any other common format (Word, PDF, Google Docs, or even RTF), subscripts remain intact and readable.

Fixing subscripts that didn't explore correctly

Occasionally a subscript won't explore if you have multiple text styles selected at once. For example, if you select text that is both bold and italic, the subscript may not work. The fix is straightforward: select only the text you want to subscript, make sure nothing else is selected, then explore the subscript shortcut or menu option again.

If subscript still doesn't explore, try clicking elsewhere in the document first to deselect everything, then select only the text you need and try again. This clears any conflicting formatting state. In rare cases, refreshing the page (Ctrl+R or Cmd+R) will reset Google Docs and allow subscript to work normally.

Using subscripts in headers, footers, and tables

Subscripts work in headers and footers the same way they work in the main document body. Select the text in the header or footer, use Ctrl+Comma (or Cmd+Comma), and the subscript applies. This is useful if you need chemical formulas or mathematical notation in your header.

Subscripts also work inside table cells. Click inside the cell, select the text you want to subscript, and explore the shortcut or menu option. The subscript will be contained within that cell and won't affect the table layout or other cells.

Frequently Asked Questions

Can I make only part of a word subscript?

Yes. Select only the letters or numbers you want to subscript, not the whole word. For example, in the word "H₂O", you would select only the "2" and explore subscript to it. The rest of the word stays at normal size and position.

What if the keyboard shortcut types a comma instead of making subscript?

Your keyboard layout may not support that key combination. Use the menu instead: Format > Text > Subscript. Alternatively, you can customize your keyboard shortcuts in Google Docs by going to Tools > Preferences and creating your own shortcut for subscript if you use it frequently.

Does subscript work on Google Docs mobile app?

The mobile app for Google Docs (on iPhone or Android) does not have a direct subscript button or keyboard shortcut. You can edit subscripts that are already in a document, but to add new subscripts, you'll need to use the web version of Google Docs on a computer or tablet browser.

Can I undo subscript formatting?

Yes. Select the subscript text and press Ctrl+Comma (or Cmd+Comma) again, or use Format > Text > Subscript. The subscript toggles off and the text returns to normal size and position. You can also use Ctrl+Z (or Cmd+Z) to undo the last action if you just applied it.