Subscript characters use keyboard shortcuts, not a separate key

There is no dedicated subscript key on a standard keyboard. Instead, you use a keyboard shortcut — a combination of keys pressed together — to make text appear smaller and lower than the regular line. The shortcut changes depending on what program you are using: Microsoft Word, Google Docs, a web browser, or plain text editors all have different methods.

The most common shortcut is Ctrl + Shift + B on Windows or Cmd + Shift + B on Mac in Microsoft Word. In Google Docs, you go through the Format menu instead. If you are typing in a web form or email, your options are more limited — many do not support subscript at all, and you may need to use a workaround like typing the number or letter in parentheses or brackets.

Key Takeaways

  • Microsoft Word uses Ctrl + Shift + B (Windows) or Cmd + Shift + B (Mac) to toggle subscript on and off for selected text.
  • Google Docs requires you to select text, then go to Format > Text > Subscript from the menu bar.
  • Most web browsers and email programs do not support subscript in their text editors, so you may need to copy formatted text from Word or Docs and paste it in.
  • Some programs like LibreOffice and Apple Pages have their own shortcuts; check the Format or Text menu if the standard shortcuts do not work.

Microsoft Word subscript shortcut on Windows and Mac

In Microsoft Word, select the text or number you want to make subscript. Then press Ctrl + Shift + B on Windows or Cmd + Shift + B on Mac. The text will shrink and drop below the baseline of the surrounding text. Press the same shortcut again to turn subscript off.

If the shortcut does not work, your version of Word may use a different key combination. Open the File menu, go to Options (Windows) or Preferences (Mac), then search for "subscript" in the Customize Keyboard section. You can see what shortcut is assigned and change it if needed.

Google Docs subscript through the Format menu

Google Docs does not have a keyboard shortcut for subscript by default. Instead, select the text you want to format, then click the Format menu at the top. Choose Text, then Subscript from the dropdown. The text will immediately shrink and lower.

To remove subscript, select the text again and go to Format > Text > Subscript a second time — it toggles off. If you use subscript often in Google Docs, you can create a custom keyboard shortcut through Tools > Preferences, though this requires setting it up manually each time you open a new document.

Other programs: LibreOffice, Apple Pages, and web editors

LibreOffice Writer uses Ctrl + Shift + B on Windows, the same as Word. On Mac, try Cmd + Shift + B first; if that does not work, go to Tools > Customize Keyboard and search for "subscript" to see what is assigned.

Apple Pages (Mac and iPad) uses Format > Text > Baseline > Subscript from the menu. There is no keyboard shortcut built in, but you can create one through System Preferences > Keyboard > Shortcuts > App Shortcuts if you use it regularly.

Most web-based text editors — including Gmail, Outlook.com, and most comment sections — do not support subscript formatting. If you need subscript in an email or web form, type the text in Word or Docs first, format it there, then copy and paste it into the web program. Some web programs will preserve the formatting; others will strip it out. Test before sending anything important.

Workarounds when subscript is not available

If the program you are using does not support subscript, you have a few options. The simplest is to type the number or letter in parentheses or brackets — for example, H(2)O instead of H₂O, or write "2nd" instead of using a superscript 2. This is readable and works everywhere.

Another option is to use Unicode characters. Many subscript numbers and letters have Unicode equivalents that you can copy and paste. For example, the subscript 2 is Unicode U+2082. You can search "Unicode subscript" online and find a chart, then copy the character you need. This works in most programs, including web forms and email, but it is slower than using a keyboard shortcut.

If you are writing chemistry or math formulas regularly, consider using a dedicated equation editor. Microsoft Word has an Equation Editor (Insert > Equation) that handles subscript and superscript automatically. Google Docs has a similar tool under Insert > Equation. These are faster than formatting individual characters if you have many formulas to type.

Why subscript shortcuts differ between programs

Different programs use different shortcuts because there is no universal standard set by keyboard manufacturers. Microsoft chose Ctrl + Shift + B for Word decades ago, and other programs either copied it or created their own. Web browsers and email programs often skip subscript support entirely because the underlying code (HTML) requires extra markup that many users do not need.

This is why the first step is always to check what program you are in. If a shortcut does not work, look in the Format, Text, or Insert menu — most programs put subscript there if they support it at all. The menu path is usually more reliable than trying to guess the keyboard shortcut.

Frequently Asked Questions

Is subscript the same as superscript?

No. Subscript is smaller text that sits below the baseline (like the 2 in H₂O). Superscript is smaller text that sits above the baseline (like the 2 in x²). Most programs have separate shortcuts for each — superscript is usually Ctrl + Shift + P on Windows or Cmd + Shift + P on Mac in Word.

Can I use subscript in a text message or social media post?

Most text messaging apps and social media platforms do not support subscript formatting. If you type it in Word and copy it over, the formatting usually strips out. Your best option is to use Unicode subscript characters (copy-paste from a Unicode chart) or type a workaround like "H2O" or "H(2)O".

Why does the keyboard shortcut not work in my program?

The program either does not support subscript, or it uses a different shortcut. Check the Format or Text menu to see if subscript is listed there. If it is, use the menu instead. If subscript is not in the menu at all, the program does not support it, and you will need to use a workaround or switch to a program that does.

Can I set a custom keyboard shortcut for subscript?

Yes, in most programs. Go to the Preferences, Options, or Settings menu and search for "Customize Keyboard" or "Keyboard Shortcuts." Find subscript in the list and assign a new shortcut. The steps vary by program, so check the help documentation if you get stuck.