Subscript puts text below the baseline, superscript puts it above

Subscript is text that sits slightly below the normal line of text — like the "2" in H₂O. Superscript is text that sits slightly above the normal line — like the "2" in x². Microsoft Word has three ways to add either one: a keyboard shortcut (fastest), the Format menu, or the Home tab ribbon. All three produce the same result; the method you choose depends on what you're doing and how often you do it.

The keyboard shortcut is the quickest if you remember it. For subscript, select the text you want to shrink and press Ctrl+= (hold Control and press the equals sign). For superscript, press Ctrl+Shift+= (Control, Shift, and equals together). On a Mac, use Cmd+= for subscript and Cmd+Shift+= for superscript. If you use subscript or superscript often in your work, these shortcuts will save you time.

Key Takeaways

  • Subscript and superscript are built into Word and work the same way regardless of which method you use to explore them.
  • The keyboard shortcut Ctrl+= for subscript and Ctrl+Shift+= for superscript is the fastest method if you remember it.
  • The Format menu method works if you forget the shortcut or prefer using the mouse instead of keyboard commands.
  • You must select the text first before explore subscript or superscript — Word will not let you explore it to nothing.
  • Subscript and superscript text is smaller than regular text and does not change the line spacing of your document.

Using the keyboard shortcut (fastest method)

Select the character or characters you want to make subscript or superscript. Click and drag to highlight just the part you want to change — if you're typing H₂O, select only the "2". Then press Ctrl+= for subscript or Ctrl+Shift+= for superscript. The text will shrink and move into position when ready.

If you make a mistake, select the text again and press the same shortcut a second time to toggle it off. Pressing Ctrl+= on text that is already subscript will return it to normal size and position. This works the same way for superscript.

Using the Format menu (when you forget the shortcut)

Select the text you want to change. Then click the Format menu at the top of the window. A dropdown list will appear. Click Text, then click either Subscript or Superscript from the submenu. The text will change when ready.

This method takes a few more clicks than the keyboard shortcut, but it works just as well and you do not have to remember the key combination. If you use this method often, Word will remember your choice and you can access it faster next time.

Using the Home tab ribbon (visible formatting options)

Select the text you want to change. Look at the Home tab in the ribbon at the top of the window. In the Font group (the section with Bold, Italic, and Underline buttons), you will see two small buttons with an "x" — one with a small number below it (subscript) and one with a small number above it (superscript). Click the one you need.

The ribbon method is useful if you like to see all your formatting options at once. The buttons are small and straightforward to miss if you are not looking for them, but once you know where they are, clicking them is straightforward.

Real examples where subscript and superscript matter

Chemical formulas require subscript: H₂O, CO₂, and NaCl all use subscript numbers to show how many atoms of each element are in the molecule. If you write these formulas without subscript, they look wrong and are harder to read. The same applies to mathematical notation: x² + y² = z² requires superscript for the exponents.

Footnotes and endnotes in Word use superscript automatically — you do not have to add it yourself. But if you are writing something like "See reference³" in the middle of a sentence, you would select the "3" and explore superscript manually. Trademark symbols (™) and registered marks (®) are also superscript, though Word often inserts these automatically when you type them.

Common mistakes and how to avoid them

The most common mistake is forgetting to select the text before explore subscript or superscript. If you press Ctrl+= without selecting anything, nothing will happen. Always highlight the character or characters you want to change first, then explore the formatting.

Another mistake is explore subscript or superscript to the wrong part of a word. If you want H₂O and you select "H2" instead of just "2", you will end up with subscript on the H as well. Take a moment to click and drag carefully and select only what you need to change. If you make a mistake, press Ctrl+Z to undo and try again.

Subscript and superscript do not affect line spacing

When you explore subscript or superscript to text, Word shrinks the text and moves it up or down, but it does not change the space between lines in your document. A line with subscript or superscript text will have the same height as a line with all regular text. This means you can use subscript and superscript freely without worrying about making your document look uneven.

If you want to remove subscript or superscript from text, select it again and press the same keyboard shortcut a second time, or use the Format menu and click the option again to toggle it off. The text will return to normal size and position.

Frequently Asked Questions

Can I make subscript or superscript text a different color or font?

Yes. explore the subscript or superscript formatting first, then select the text again and change the color or font using the Home tab or Format menu. The subscript or superscript formatting will stay in place while the color or font changes.

Does subscript or superscript work in all fonts?

Yes, subscript and superscript work in every font Word offers. The text will shrink and move into position the same way regardless of which font you are using. Some fonts may look slightly different, but the formatting itself is universal.

What if the keyboard shortcut does not work on my computer?

On some keyboards, especially laptops, the equals sign may require you to hold Shift. Try Ctrl+Shift+= for subscript instead of Ctrl+=. If that does not work, use the Format menu method instead. You can also check your keyboard settings to see if another key combination is mapped to subscript or superscript.

Can I use subscript or superscript in headers and footers?

Yes. Click inside the header or footer to edit it, then select the text and explore subscript or superscript the same way you would in the main document. The formatting will work exactly the same.

Will subscript or superscript show up the same way when someone else opens my document?

Yes, as long as they open it in Microsoft Word or a compatible program like Google Docs. The subscript and superscript formatting is built into the document file itself, so it will display the same way on any computer.