The fastest way to add a subscript on a Mac

On a Mac, the quickest method depends on which program you are using. In Microsoft Word, select the text you want to make smaller and lower, then press Command + Control + B. In Google Docs, highlight the text, click Format in the menu, select Text, then click Subscript. In Apple Mail and most other programs, you will need to use the Character Viewer to insert a subscript character directly.

The keyboard shortcut works immediately in Word and saves you from hunting through menus. Google Docs requires a few more clicks but works the same way every time. For programs without a built-in subscript button, the Character Viewer method takes longer but works anywhere on your Mac.

Key Takeaways

  • Word on Mac uses Command + Control + B to subscript selected text, and the same shortcut removes subscript formatting.
  • Google Docs requires you to select text, then go to Format > Text > Subscript, which works for any text in a document.
  • Mail and other programs without subscript buttons can use the Character Viewer to find and insert subscript numbers and letters.
  • Subscript formatting shrinks text and lowers it below the baseline, commonly used in chemical formulas, footnote numbers, and mathematical notation.

Using the keyboard shortcut in Microsoft Word

Word for Mac has a dedicated keyboard shortcut that works faster than any menu. Select the text or number you want to subscript by clicking and dragging across it. Then press Command + Control + B all at once. The text will immediately shrink and drop below the line.

To remove subscript formatting, select the subscripted text again and press the same shortcut a second time. The formatting will toggle off. This works for single characters, whole words, or multiple characters in a row — select whatever you need to format and the shortcut applies to all of it.

If you prefer using the menu instead, select your text, then click the Home tab, find the subscript button (it looks like a small "x" with a number below it), and click it. The keyboard shortcut is faster once you remember it, but the button is there if you need it.

Adding subscripts in Google Docs

Google Docs does not have a keyboard shortcut for subscript, but the menu path is consistent and straightforward. Highlight the text you want to make subscript. Click Format in the top menu bar. A dropdown will appear — click Text. Another submenu opens showing text formatting options. Click Subscript.

The text will shrink and drop below the baseline immediately. To remove subscript formatting, select the text again and follow the same path: Format > Text > Subscript. Clicking it a second time toggles the formatting off. This method works whether you are typing a chemical formula like H₂O or adding a subscript number to a variable in a math problem.

Google Docs also offers a superscript option in the same menu if you need text raised above the line instead. Both options are in the same Format > Text location, so once you know where to find one, you know where to find the other.

Using the Character Viewer for Mail and other programs

Programs like Mail, Notes, and many others do not have built-in subscript buttons. For these, you can insert subscript characters directly using the Character Viewer. Open the program where you want to type the subscript. Click the Edit menu (or the equivalent in that program), then look for an option called Character Viewer, Special Characters, or Emoji & Symbols.

If you do not see it in the Edit menu, try the Input menu in the top menu bar. When the Character Viewer window opens, search for "subscript" in the search box at the top. A list of subscript numbers and letters will appear. Click the one you need — for example, subscript 2 or subscript n — and click the Insert button. The character will appear in your document at the cursor position.

This method is slower than a keyboard shortcut or menu option, but it works in any program on your Mac. The subscript characters are real characters, not formatting applied to regular text, so they will display correctly even if someone opens your document in a different program or on a different device.

When to use subscripts and what they look like

Subscripts are smaller characters positioned below the baseline of regular text. They are used in chemistry to show the number of atoms in a molecule (H₂O, CO₂), in mathematics for variable notation (x₁, x₂), and in footnotes or citations where a small number appears after a word. They are different from superscripts, which appear above the line and are used for exponents (x²) and footnote markers.

On a Mac, subscript formatting is purely visual — the program shrinks the text and moves it down. When you copy and paste subscripted text from Word or Google Docs into another program, the formatting may or may not carry over, depending on whether the receiving program supports it. If you need the subscript to survive in any program, use the Character Viewer method instead, which inserts actual subscript characters rather than formatting.

Troubleshooting subscripts that do not work

If the keyboard shortcut in Word does not work, check that you are pressing all three keys at once: Command, Control, and B. On some Mac keyboards, you may need to hold them slightly longer. If nothing happens, your version of Word may not support the shortcut — try the menu method instead by going to Home and clicking the subscript button.

If subscript text appears in Word but disappears when you paste it into another program, that program does not support subscript formatting. Use the Character Viewer to insert actual subscript characters instead. These will survive copying and pasting because they are characters, not formatting.

In Google Docs, if the Format menu does not show a Text option, you may be using an older version of the browser or a different account with different permissions. Try refreshing the page or logging out and back in. If the problem continues, try a different browser.

Superscript as an alternative

If you need text raised above the line instead of lowered, use superscript. In Word, the shortcut is Command + Shift + P. In Google Docs, go to Format > Text > Superscript. Superscript is used for exponents (2³), trademark symbols (™), and footnote numbers in some styles. The process is identical to subscript — select your text and apply the formatting.

Some documents use both subscript and superscript. For example, a chemistry equation might have subscript numbers for atom counts and superscript numbers for charge (like Ca²⁺). Format each part separately by selecting it and applying the appropriate formatting.

Frequently Asked Questions

Can I make subscripts in Apple Notes?

Apple Notes does not have a subscript button in the menu. Use the Character Viewer instead: open Character Viewer from the Edit menu, search for "subscript", and click Insert next to the character you need. The subscript character will appear in your note.

Will subscript formatting stay if I email a Word document?

Yes, if you send the Word document as an attachment. The formatting is saved in the file. If you copy and paste subscripted text directly into an email message in Mail, the formatting may be lost because Mail does not always support subscript. Send the Word file as an attachment to preserve formatting.

What is the difference between subscript and smaller text?

Subscript is both smaller and positioned below the baseline. If you only make text smaller without lowering it, it will not look like a proper subscript. Use the subscript formatting option to get both the size and position correct.

Can I undo subscript formatting?

Yes. Select the subscripted text and press the subscript shortcut or menu option again. In Word, press Command + Control + B a second time. In Google Docs, go to Format > Text > Subscript again. The formatting will toggle off and the text will return to normal size and position.

Do subscript characters work on all devices?

Subscript formatting (applied through Word or Google Docs) may not display correctly on all devices or programs. Subscript characters inserted through the Character Viewer are more reliable because they are actual characters, not formatting. If your document will be opened on many different devices, use the Character Viewer method.