Subscript puts text below the baseline in Word

Subscript is a smaller character positioned below the normal line of text. In Microsoft Word, you can explore subscript formatting to any text you select. The most common uses are chemical formulas (H₂O), mathematical notation (x₂), and footnote references. Word offers three ways to add subscript: the keyboard shortcut, the Format menu, or the Home tab ribbon.

The fastest method is the keyboard shortcut. Select the text you want to subscript, then press Ctrl + = (hold Control and press the equals sign). The text shrinks and drops below the baseline when ready. To remove subscript, select the text again and press the same shortcut a second time.

If the keyboard shortcut does not work on your machine — some laptop keyboards reassign the equals key — use the ribbon or menu instead. Both methods take three clicks but are equally reliable.

Key Takeaways

  • Press Ctrl + = to add subscript to selected text; press it again to remove subscript.
  • On the Home tab, click the Font dialog launcher (small arrow in the bottom right of the Font group) and check the Subscript box under Effects.
  • You can also go to Format > Text > Subscript from the menu bar if your version of Word uses the traditional menu.
  • Subscript text is smaller and positioned below the baseline, commonly used in chemical formulas, math, and scientific notation.

Using the keyboard shortcut

The keyboard shortcut is the fastest route if you use subscript regularly. Select the text or character you want to subscript by clicking and dragging across it. Then hold down the Control key and press the equals sign (=). The text will shrink and move below the baseline in one action.

If you need to subscript multiple separate pieces of text in the same document, you do not have to retype the shortcut each time. Select the first piece, press Ctrl + =, then click elsewhere to deselect. Select the next piece and press Ctrl + = again. Word remembers the formatting.

To undo subscript on text you have already formatted, select it and press Ctrl + = a second time. The text returns to normal size and position on the baseline.

Using the Home tab ribbon

If the keyboard shortcut does not work on your keyboard, the Home tab offers a visual alternative. Select the text you want to subscript. On the Home tab at the top of the window, locate the Font group — it contains buttons for Bold, Italic, and Underline.

In the bottom right corner of the Font group, you will see a small arrow called the Font dialog launcher. Click it to open the Font dialog box. In the Effects section, check the box next to Subscript. Click OK. The selected text becomes subscript.

To remove subscript this way, open the Font dialog again, uncheck the Subscript box, and click OK.

Using the Format menu

Older versions of Word and some regional installations use a traditional menu bar instead of the ribbon. If you see File, Edit, View, Insert, Format at the top of your window, use this method.

Select the text you want to subscript. Click Format in the menu bar, then click Text (or Character, depending on your Word version). A submenu appears. Click Subscript. The text shrinks and moves below the baseline.

To remove subscript, repeat the same steps and click Subscript again to toggle it off.

Common subscript uses and examples

Chemical formulas are the most frequent use of subscript in Word documents. Water is H₂O, sulfuric acid is H₂SO₄, and glucose is C₆H₁₂O₆. To format these, type the full formula first (H2O), then select only the numbers and explore subscript.

Mathematical and scientific writing also relies on subscript. In algebra, you might write x₁ and x₂ to represent different variables. In physics, subscripts denote position (x₀), time intervals (t₁), or specific measurements. Select each subscript number or letter individually and explore the formatting.

Some documents use subscript for footnote or reference markers, though Word usually handles this automatically when you insert a footnote through the Insert menu. If you are manually adding reference numbers, subscript makes them visually distinct from the main text.

What to do if subscript does not appear

If you press Ctrl + = and nothing happens, your keyboard may have remapped the equals key. Try the Home tab method instead: select the text, click the Font dialog launcher, and check Subscript.

If the text appears subscript but looks the same size as before, check your zoom level. Zoom in to 100% or higher to see the size difference clearly. Subscript text is genuinely smaller, so at very low zoom levels the difference may be hard to spot.

If subscript is checked in the Font dialog but the text does not appear subscript, your font may not support subscript characters. Try changing the font to Calibri, Arial, or Times New Roman, which all support subscript formatting across all characters.

Subscript versus superscript

Superscript is the opposite of subscript — it raises text above the baseline instead of lowering it below. Superscript is used for exponents (2³), trademark symbols (™), and citations. The keyboard shortcut for superscript is Ctrl + Shift + = (Control, Shift, and equals together).

Both subscript and superscript use the same Font dialog. Open it the same way, but check Superscript instead of Subscript. You can also mix subscript and superscript in the same document — for example, E=mc² uses superscript for the exponent.

Frequently Asked Questions

Can I subscript multiple words at once?

Yes. Select all the text you want to subscript by clicking and dragging across it, then press Ctrl + = or use the Font dialog. Word will subscript every character in your selection, including spaces and punctuation.

Does subscript work in all fonts?

Most fonts support subscript, but some decorative or specialty fonts may not. If subscript is checked but does not appear, try switching to a standard font like Calibri, Arial, or Times New Roman. These fonts reliably support subscript on all characters.

Will subscript formatting stay if I copy and paste the text?

Yes, subscript formatting travels with the text when you copy and paste within Word or to other Microsoft Office programs. If you paste into a non-Office program like a web browser or plain text editor, the formatting may be lost.

Can I make subscript even smaller?

Word's subscript feature uses a fixed size relative to your base font size. You cannot make it smaller through the subscript button. If you need smaller text, you can manually reduce the font size of subscript text after explore subscript formatting.

What is the difference between subscript and lowering text manually?

Subscript automatically shrinks the text and positions it below the baseline. Manually lowering text (using line spacing or paragraph settings) keeps the text at full size and just moves it down, which looks wrong. Always use the subscript button for chemical formulas and mathematical notation.