Adding subscript in PowerPoint

To add subscript in PowerPoint, select the text you want to make smaller and lower, then use the Format menu or a keyboard shortcut. On Windows, highlight your text and press Ctrl + = (Control and the equals sign). On Mac, use Cmd + = (Command and the equals sign). The text will shrink and drop below the baseline of the surrounding text.

If the keyboard shortcut does not work, you can use the Format menu instead. Select your text, go to Format in the menu bar, choose Text, then click Subscript. This method works the same way on both Windows and Mac versions of PowerPoint.

Subscript is useful for chemical formulas (like H₂O), mathematical notation, footnote markers, and trademark symbols. Once you apply subscript to text, you can still edit it, copy it, or change its font size — the subscript formatting stays attached to those characters.

Key Takeaways

  • Press Ctrl + = on Windows or Cmd + = on Mac to turn selected text into subscript without opening any menus.
  • If keyboard shortcuts do not work on your device, use Format > Text > Subscript from the menu bar instead.
  • Subscript text shrinks and lowers automatically; you do not need to manually adjust the size or position.
  • You can undo subscript formatting by selecting the text again and pressing the same keyboard shortcut a second time.

Using the Format menu when shortcuts do not respond

Some keyboards or PowerPoint versions do not respond to the Ctrl + = or Cmd + = shortcut. If that happens, the Format menu is your backup route. Click on the text box containing the text you want to change, then triple-click or drag to select only the characters that should be subscript.

Once the text is highlighted, open the Format menu at the top of the screen. Look for an option labeled Text or Character (the exact name varies by PowerPoint version). Click it, and a dialog box will open. Find the Subscript checkbox or button and click it. The text will immediately drop and shrink.

This method also works if you want to see other text formatting options at the same time — the dialog box usually shows bold, italic, underline, and other choices alongside subscript and superscript.

Removing subscript formatting

To remove subscript from text, select the subscripted characters and press the same keyboard shortcut again. On Windows, that is Ctrl + = a second time. On Mac, press Cmd + = again. The text will return to normal size and position on the baseline.

If you used the Format menu to apply subscript, you can remove it the same way — select the text, go to Format > Text, and click Subscript again to toggle it off. There is no separate "remove subscript" button; the same action turns it on and off.

Subscript versus superscript

Subscript makes text smaller and lower. Superscript makes text smaller and raises it above the baseline instead. In PowerPoint, superscript uses the same keyboard shortcut as subscript, but with a plus sign instead of an equals sign: Ctrl + Shift + + on Windows or Cmd + Shift + + on Mac.

Use superscript for exponents (like x²), trademark symbols (™), and footnote numbers. Use subscript for chemical formulas, mathematical subscripts, and some scientific notation. Both formatting options shrink the text automatically, so you do not need to change the font size yourself.

Subscript in text boxes versus slide titles

Subscript works the same way whether you are typing in a regular text box, a title box, or a bullet point. Select the text you want to subscript and use the keyboard shortcut or Format menu — the location on the slide does not change how the formatting works.

If you are working with a title that contains subscript, keep in mind that subscript text will be noticeably smaller than the title text around it. For example, if your title is 44 points and you apply subscript, the subscripted characters might appear at 30 points or smaller. This is normal and intentional, but it can affect how your title looks visually.

Copying and pasting subscript text

When you copy text that has subscript formatting and paste it into another part of your presentation, the subscript formatting comes along. You do not need to reapply it. This works whether you paste into the same slide, a different slide, or even a different presentation.

If you paste subscript text into a program outside PowerPoint — like Word, Google Docs, or an email — the subscript usually transfers as well, though the exact appearance may vary depending on the program and font. Test it in your destination program if the formatting matters for your work.

Frequently Asked Questions

Why does the keyboard shortcut not work on my computer?

Some keyboards, especially on laptops or international layouts, do not have an equals sign in the same location or may require different key combinations. Try the Format menu instead: Format > Text > Subscript. You can also check your PowerPoint settings to see if keyboard shortcuts have been customized on your device.

Can I make subscript text even smaller?

Yes. After applying subscript, select the text again and reduce the font size manually. Subscript does not lock the size — it just makes the text smaller than the surrounding text by default. You can make it as small as you need for your slide.

Does subscript work in PowerPoint Online?

PowerPoint Online has limited formatting options compared to the desktop version. The keyboard shortcut may not work, but you can usually find subscript in the Format menu or in a text formatting toolbar. If you need subscript regularly, the desktop version of PowerPoint offers more reliable access to this feature.

What happens to subscript if I change the font?

The subscript formatting stays attached to the text. If you select subscripted text and change the font, the text will stay subscripted in the new font. The size and position adjust automatically to match the new font's baseline and proportions.