The fastest way to add subscript on Mac

On a Mac, the quickest route to subscript is the keyboard shortcut Command + Control + B. Highlight the text or number you want to make subscript, then press those three keys together. The text shrinks and drops below the baseline immediately. This works in most Mac applications — Pages, Word, Google Docs, and many others — though some programs have their own rules.

If that shortcut does not work in your program, try Command + Shift + B instead. A few applications use this version. If neither works, the program likely does not support keyboard shortcuts for subscript, and you will need to use the menu instead.

Key Takeaways

  • Command + Control + B is the standard Mac subscript shortcut; highlight your text first, then press all three keys at once.
  • Command + Shift + B is an alternative that works in some applications when the first shortcut does not.
  • If keyboard shortcuts do not work, use the Format menu in your application and look for Character, Text, or Typography options.
  • Google Docs, Microsoft Word, and Apple Pages all support subscript, but the menu path differs slightly in each one.

Using the Format menu when shortcuts do not work

Open the Format menu at the top of your screen. The exact path depends on which program you are using. In Pages, click Format, then Text, then look for Baseline. In Microsoft Word, click Format, then Character, then Effects. In Google Docs, click Format, then Text, then Subscript.

Highlight the text you want to change before you open the menu. Once you find the subscript option, click it. The text will shift down and shrink. Click the same option again to turn subscript off and return the text to normal.

Subscript in Google Docs and Word Online

Google Docs offers a dedicated subscript button in the toolbar. Look for the icon that shows a small letter below a baseline — it usually sits near the superscript button. Click it, then type your subscript text. You can also highlight existing text and click the button to convert it.

In Word Online (the browser version), use the Format menu path above, or look for the subscript button in the Home tab of the ribbon. It looks like an X with a small number below it. The keyboard shortcut Ctrl + = also works in Word Online on Mac, though Command + Control + B is more reliable in the desktop version.

Subscript in Apple Numbers and other spreadsheets

Numbers (Apple's spreadsheet program) does not support subscript formatting within cells the way word processors do. If you need subscript in a spreadsheet, you have two options: use a word processor like Pages instead, or type the subscript character directly if it exists (for example, ₂ for the number 2 subscript, which you can find by searching "subscript 2" in your web browser and copying it).

Excel on Mac does support subscript. Highlight the text in a cell, then use Command + Control + B or go to Format, Cells, Font, and check the Subscript box.

Typing subscript numbers and chemical formulas

For chemistry or math, you often need subscript numbers. The keyboard shortcut works for any character — highlight the number or letter, press Command + Control + B, and it becomes subscript. This is how you would type H₂O or CO₂ in a document.

If you type subscript frequently, you can also use the Character Viewer on Mac. Press Control + Command + Space to open it, search for "subscript" or the specific number you need, and double-click to insert it. This inserts the actual subscript character rather than formatting regular text, which can be useful if you are copying the text into other programs.

What to do if subscript is not available in your program

Some applications — particularly older ones or specialized software — do not support subscript at all. If the keyboard shortcut and menu options do not work, the program simply does not have the feature built in. Your options are to switch to a program that does support it, or to use the Character Viewer method above to insert actual subscript characters instead of formatting.

If you are working in a web browser or online tool that does not support subscript, check whether the tool has a help section or documentation. Some online editors have subscript hidden in an advanced formatting menu or require you to use HTML or markdown syntax instead.

Frequently Asked Questions

Why does Command + Control + B not work in my program?

Not all Mac programs recognize this shortcut. Some use Command + Shift + B instead, and others do not support subscript formatting at all. Check your program's Format menu or help documentation for the correct method. If nothing works, the program likely does not have subscript built in.

Can I make subscript permanent in my document?

Yes. Once you format text as subscript using the keyboard shortcut or menu, it stays subscript when you save the document. If you open the file in a different program that does not support subscript, the formatting may be lost, but it will remain in the original program.

Is there a way to type subscript without highlighting first?

Not with the standard shortcut. You must highlight the text first, then apply the formatting. If you want to type subscript as you go, use the Character Viewer to insert actual subscript characters, which does not require highlighting.

Does subscript work the same way in Word on Mac as on Windows?

The menu path is the same, but the keyboard shortcut differs. On Mac, use Command + Control + B. On Windows, use Ctrl + =. Both methods work in Word on Mac, though the Mac shortcut is more reliable.