What subscript is and when you need it
Subscript is a smaller character positioned below the baseline of regular text. It appears in chemical formulas (H₂O), mathematical notation (x₂), footnote markers, and some technical writing. Most word processors and online platforms have a built-in button or keyboard shortcut to create it without hunting through menus.
The method you use depends on what program you are working in. Microsoft Word, Google Docs, and most text editors each have their own path. If you are typing in a web form or email that does not support formatting buttons, a keyboard shortcut is often your only option.
Key Takeaways
- In Microsoft Word, select the character you want as subscript, then press Ctrl+= (Windows) or Cmd+= (Mac).
- In Google Docs, select the text, then use Format > Text > Subscript from the menu, or press Ctrl+, (comma) on Windows or Cmd+, on Mac.
- Many web forms and plain-text fields do not support subscript formatting at all; check whether the platform offers a formatting toolbar first.
- If your keyboard shortcut does not work, the program may not support subscript, or you may need to enable it in settings or use a different tool.
Subscript in Microsoft Word
The fastest way in Word is the keyboard shortcut. Type the character you want to make subscript, select it by clicking and dragging or double-clicking, then press Ctrl+= (equal sign) on Windows or Cmd+= on Mac. The character shrinks and drops below the line immediately.
If the keyboard shortcut does not work, use the menu instead. Select the character, then go to Home tab, find the Font group, and click the small arrow in the bottom right corner. A dialog box opens. Check the box next to Subscript and click OK. You can also right-click the selected text and choose Font from the context menu to reach the same dialog.
To undo subscript formatting, select the text again and press Ctrl+= a second time, or uncheck the Subscript box in the Font dialog.
Subscript in Google Docs
Google Docs offers both a menu route and a keyboard shortcut. Select the character or word you want as subscript. Then press Ctrl+, (comma) on Windows or Cmd+, on Mac. The text shrinks and moves below the baseline.
If you prefer the menu, select the text and click Format in the top menu bar. Hover over Text, then click Subscript. The same formatting applies. To remove subscript, select the text again and use the same shortcut or menu path a second time.
Google Docs also has a superscript option (text raised above the line) in the same Format > Text menu if you need it for exponents or citations.
Subscript in other programs and platforms
LibreOffice Writer uses Ctrl+Shift+B on Windows or Cmd+Shift+B on Mac. Apple Pages has a Format menu with a Text submenu that includes subscript. In most web-based editors (Notion, Canva, Slack), look for a formatting toolbar with a button marked "subscript" or an icon that looks like a small letter below a line.
Plain-text editors like Notepad do not support subscript at all because they only store letters and numbers without formatting. Email clients vary: Gmail's compose window does not support subscript formatting, but you can copy formatted text from Word or Docs and paste it into Gmail, and it usually holds the formatting.
If you are filling out a web form and subscript is not available, type the number or letter normally and note it in parentheses if needed (for example, "H2O" or "H(2)O"). Most forms that require chemical or mathematical notation will tell you upfront whether they support special formatting.
Keyboard shortcuts at a glance
| Program | Windows Shortcut | Mac Shortcut |
|---|---|---|
| Microsoft Word | Ctrl+= | Cmd+= |
| Google Docs | Ctrl+, | Cmd+, |
| LibreOffice Writer | Ctrl+Shift+B | Cmd+Shift+B |
| Apple Pages | N/A | Cmd+Shift+B |
What to do if the shortcut does not work
First, make sure you have selected the text. Subscript shortcuts only work on highlighted characters; if nothing is selected, the shortcut will do nothing or trigger a different command. Click and drag to select the character, or double-click a word to select it.
Second, check that you are using the correct shortcut for your program and operating system. The shortcut for Word is different from Google Docs, and Windows shortcuts differ from Mac. If you are unsure, open the program's Help menu and search for "subscript" — most programs list the shortcut there.
Third, some programs require you to enable subscript in settings or preferences before the shortcut works. Check the program's settings or preferences panel if the shortcut fails. If subscript is not available in your program at all, copy the text into a program that supports it (Word or Google Docs), format it there, and paste it back.
Frequently Asked Questions
Can I make subscript text in email?
Gmail's compose window does not have a subscript button or shortcut. However, you can type and format text in Word or Google Docs, copy it with subscript intact, and paste it into Gmail. The formatting usually carries over. For other email clients like Outlook, check whether the compose window has a formatting toolbar with a subscript button.
Does subscript work in social media posts?
Most social media platforms (Facebook, Twitter, Instagram, TikTok) do not support subscript formatting in posts or comments. If you need to show subscript text, type it as plain text with a note in parentheses, or take a screenshot of formatted text from Word or Docs and post it as an image.
What is the difference between subscript and superscript?
Subscript is text positioned below the baseline (like the 2 in H₂O). Superscript is text positioned above the baseline (like the 2 in x²). Most programs have shortcuts for both. In Word, superscript is Ctrl+Shift+= on Windows or Cmd+Shift+= on Mac. In Google Docs, it is Ctrl+. (period) on Windows or Cmd+. on Mac.
Can I copy and paste subscript text between programs?
Yes. If you format text as subscript in Word, you can copy it and paste it into Google Docs, email, or most other programs, and the subscript formatting usually stays. However, pasting into plain-text fields or some web forms will lose the formatting and show the text as regular size.
Why does my subscript look too small or hard to read?
Subscript is designed to be smaller than regular text. If it is hard to read, you can select it and increase the font size slightly while keeping the subscript formatting. In Word, select the subscript text, then increase the font size in the toolbar. The text will stay subscript but be larger overall.