The quickest way to add subscript in Google Docs

To add subscript in Google Docs, select the text you want to make smaller and lower, then go to Format > Text > Subscript. The text will instantly shrink and drop below the baseline. You can also use the keyboard shortcut Ctrl+, (comma) on Windows or Cmd+, on Mac to toggle subscript on and off without opening the menu.

Subscript is useful for chemical formulas like H₂O, mathematical notation, or footnote references. Once you apply it, the formatting stays with that text even if you edit or move it around the document.

Key Takeaways

  • Use Format > Text > Subscript from the menu, or press Ctrl+, (Windows) or Cmd+, (Mac) to format selected text as subscript.
  • Subscript text appears smaller and sits below the normal text line, which is different from superscript that sits above.
  • You can apply subscript to a single character, a word, or multiple words at once by selecting them first.
  • The keyboard shortcut works as a toggle, so pressing it again removes the subscript formatting from selected text.

Selecting text before applying subscript

The first step is to highlight the text you want to make subscript. Click at the start of the text, then drag to the end to select it. You can select as little as one character (like the "2" in H₂O) or as much as an entire phrase.

If you want to add subscript to text that does not exist yet, you can type normally first, then go back and select what you need. There is no way to turn subscript mode on and then type — you always select first, then apply the formatting.

Using the Format menu

After selecting your text, click Format in the top menu bar. A dropdown list will appear with several options. Look for Text and hover over it — another menu will pop out showing Superscript and Subscript. Click Subscript and your selected text will change immediately.

This method works the same way on any device — computer, tablet, or phone — since you are using the menu rather than a keyboard shortcut. The menu approach is slower than the keyboard shortcut, but it is reliable if you forget the key combination.

The keyboard shortcut method

Once you have text selected, press Ctrl+, on a Windows computer or Cmd+, on a Mac. The subscript formatting applies instantly without opening any menus. Pressing the same keys again removes the subscript, so you can toggle it on and off as needed.

The comma key is easy to remember because it sits at the bottom of the keyboard, which matches where subscript text sits on the page. If the shortcut does not work, make sure you are holding Ctrl (or Cmd) and pressing the comma key itself, not the period or another key nearby.

Subscript versus superscript

Subscript and superscript are opposites. Subscript makes text smaller and lowers it below the baseline — use this for chemical formulas, mathematical indices, and some footnote styles. Superscript makes text smaller and raises it above the baseline — use this for exponents, trademark symbols, and some citation formats.

The superscript shortcut is Ctrl+. (period) on Windows or Cmd+. on Mac. Both shortcuts use the same modifier key (Ctrl or Cmd) but different punctuation marks, so they are easy to keep straight once you use them a few times.

Removing subscript formatting

To remove subscript from text, select the subscripted text and press the subscript shortcut again (Ctrl+, or Cmd+,). The text will return to normal size and position. You can also go through the Format menu and click Subscript a second time to toggle it off.

If you select multiple pieces of text that have different formatting, applying subscript will add it to everything you selected, even if some of it was already subscript. This is useful if you want to make sure a whole section is consistently formatted.

Common uses for subscript in documents

Chemistry and science writing use subscript constantly — water is H₂O, sulfuric acid is H₂SO₄, and methane is CH₄. In mathematics, subscript appears in sequences and series notation, like x₁, x₂, x₃. Some academic styles also use subscript for certain types of footnotes or reference markers.

Business and technical documents sometimes use subscript for version numbers or model designations, though this is less common. If you are writing in a specific field or following a style guide, check whether subscript is required or preferred for your document type.

Frequently Asked Questions

Can I make subscript text a different size or color?

Yes. Apply subscript first, then with the text still selected, use Format > Text to change the font size or Format > Text color to change the color. The subscript position stays the same — only the size and color change. You can also apply bold or italic to subscript text the same way.

Does subscript work in Google Docs on my phone?

Yes, but the menu path is slightly different. Open the Format menu, tap Text, then tap Subscript. The keyboard shortcut does not work on mobile devices, so the menu is your only option. The formatting looks the same on phone, tablet, and computer.

What if the subscript shortcut does not work?

Check that you are using the comma key, not another key. Some keyboards or languages may have different shortcut assignments. If the shortcut still does not work, use the Format menu instead — it always works. You can also check your keyboard settings to see if something else is using that shortcut.

Can I copy and paste subscript text?

Yes. When you copy subscript text from Google Docs and paste it into another Google Docs document, the subscript formatting comes along. Pasting into other programs like Word or email may or may not preserve the subscript, depending on whether that program supports it.