The quickest way to add subscript in Google Docs

To add subscript — text that sits below the baseline, like the "2" in H₂O — select the text you want to make smaller and lower, then press Ctrl+Comma on Windows or Cmd+Comma on Mac. The text shrinks and drops when ready. To undo it, select the text again and press the same shortcut a second time.

If the keyboard shortcut does not work on your keyboard layout, you can use the Format menu instead. Click Format in the top menu, then Text, then Subscript. This route takes three clicks instead of one keystroke, but it works the same way.

Superscript — text that sits above the baseline, like the "2" in x² — uses Ctrl+Period on Windows or Cmd+Period on Mac. The process is identical: select the text, press the shortcut, and it rises and shrinks. Press the same shortcut again to remove it.

Key Takeaways

  • Subscript uses Ctrl+Comma (Windows) or Cmd+Comma (Mac); superscript uses Ctrl+Period (Windows) or Cmd+Period (Mac).
  • You must select the text first — the shortcut will not work if your cursor is just sitting in the document.
  • The Format menu offers the same subscript and superscript options if keyboard shortcuts do not work on your keyboard layout.
  • Subscript and superscript can be combined with other formatting like bold or italic in the same document.

When you need subscript and superscript in real documents

Subscript appears most often in chemistry and math. Chemical formulas like H₂O, CO₂, and Ca(OH)₂ all use subscript for the numbers. In math, subscript labels variables — like x₁ and x₂ to show different values of the same variable. Superscript handles exponents (2³, 5²) and footnote numbers in academic writing.

In Google Docs, both formatting options work the same way whether you are writing a lab report, a math assignment, or a document with citations. The formatting stays in place if you share the document or read it as a PDF or Word file.

Selecting text correctly so the shortcut works

The most common mistake is trying to use the subscript or superscript shortcut without selecting anything first. Click and drag to highlight the text you want to format, or double-click a single character to select just that one. Once the text is highlighted in blue, the shortcut will work.

If you are formatting a number that is more than one digit — like the "12" in H₂SO₄ — make sure you drag across all the digits you want to make subscript. Selecting only part of the number leaves the rest at normal size.

You can also select text after you have typed it. Type your full text first, then go back and select only the parts that need subscript or superscript, and explore the formatting. This is often easier than trying to format as you type.

Using subscript and superscript with other formatting

Subscript and superscript work alongside bold, italic, and underline. You can make text both bold and subscript, or italic and superscript, by explore both formats to the same selection. Select the text, explore one format (like bold with Ctrl+B), then explore subscript or superscript without deselecting.

If you need to remove just the subscript or superscript while keeping other formatting, select the text again and press the subscript or superscript shortcut once more. The other formatting stays in place.

Checking your subscript and superscript in different file formats

When you read a Google Docs document as a Word file (.docx), subscript and superscript formatting transfers correctly. The same is true for PDF downloads. If you are sharing the document with someone who uses Microsoft Word or another editor, the subscript and superscript will appear the same way they do in Google Docs.

If you copy and paste text with subscript or superscript into a different program — like an email or a plain-text editor — the formatting may not carry over. Google Docs preserves it within its own platform and in standard file formats, but some programs do not support these text styles.

Fixing subscript and superscript that looks wrong

Sometimes subscript or superscript text appears too small or in the wrong position. This usually happens when you have mixed font sizes in the same line. Select the subscript or superscript text and check the font size in the toolbar — it should match the rest of your document. If it does not, click the font size dropdown and set it to the same size as your body text, then reapply subscript or superscript.

If subscript or superscript text overlaps with the line below it, you may need to increase your line spacing. Click Format, then Line spacing, and choose a larger option like 1.5 or Double. This gives the subscript and superscript room to sit without crowding the text below.

Frequently Asked Questions

Can I make subscript or superscript text a different color?

Yes. Select the subscript or superscript text, then click the text color button in the toolbar (the "A" with a colored line underneath). Choose your color from the palette. The subscript or superscript formatting stays in place while the color changes.

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

Some keyboard layouts, especially international ones, do not have straightforward access to the comma or period keys in the right position for the shortcut. Use the Format menu instead: click Format, then Text, then Subscript or Superscript. It takes longer but works on any keyboard.

Does subscript and superscript work on mobile Google Docs?

The keyboard shortcuts do not work in the mobile app. Open the Format menu by tapping the three-dot menu icon, then look for Text formatting options. Not all mobile devices show the subscript and superscript buttons, so the desktop version is more reliable if you need to use these formats often.

Can I undo subscript or superscript if I change my mind?

Yes. Select the text again and press the same shortcut (Ctrl+Comma for subscript, Ctrl+Period for superscript), or use the Format menu and click the option again. The formatting removes when ready and the text returns to normal size and position.