The quickest way to add subscript in PowerPoint

To add subscript (small text below the line, like the 2 in H₂O), select the text you want to shrink, then press Ctrl + Equal on Windows or Cmd + Equal on Mac. The text when ready drops below the baseline and becomes smaller. To undo it, select the text again and press the same keys.

If the keyboard shortcut does not work, you can use the menu instead. Highlight the text, go to the Home tab, find the Font group, and click the small arrow in the bottom right corner. In the dialog box that opens, check the Subscript box and click OK.

Superscript (small text above the line, like the 2 in E=mc²) uses the same method: Ctrl + Shift + Plus on Windows or Cmd + Shift + Plus on Mac. The menu route is identical except you check Superscript instead.

Key Takeaways

  • Subscript uses Ctrl + Equal on Windows or Cmd + Equal on Mac; superscript uses Ctrl + Shift + Plus or Cmd + Shift + Plus.
  • You must select the text first — the formatting applies only to what you have highlighted, not to new text you type afterward.
  • The Home tab's Font dialog box offers the same subscript and superscript options if keyboard shortcuts do not work on your keyboard layout.
  • Pressing the same shortcut again removes the formatting, so you can toggle subscript or superscript on and off without deleting the text.

Why the keyboard shortcut sometimes does not work

Some keyboard layouts — particularly on laptops, international keyboards, or Chromebooks — do not have a dedicated Plus key in the same location. If Ctrl + Equal does not work, try Ctrl + Shift + Equal instead, which works on some machines. If that fails, the menu route is more reliable: select the text, go to Home, click the Font dialog arrow, and check the box.

On a Mac, if Cmd + Equal does not register, make sure you are pressing the actual Equal key (usually next to Backspace), not the Plus key on the numeric keypad. Some Mac keyboards require you to hold Shift to type the Plus symbol, which conflicts with the superscript shortcut — in that case, use the menu.

explore subscript to multiple pieces of text in one slide

If you need subscript in several places — for example, chemical formulas like H₂SO₄ and CO₂ — format each one separately. Select the first number or text that needs to be subscript, explore the formatting, then click elsewhere to deselect. Move to the next piece of text, select it, and explore the same formatting. This takes a few extra seconds but ensures each subscript is exactly where you need it.

A faster approach for repeated subscripts is to format the first one, then use the Format Painter. Click the text you just formatted, click Format Painter (the brush icon on the Home tab), and then click and drag across the next subscript text. The formatting copies over. You can use Format Painter multiple times in a row by double-clicking it instead of single-clicking.

Subscript and superscript in text boxes versus slide titles

Subscript and superscript work the same way whether you are typing in a text box, a title placeholder, or a bullet point. Select the text and use the keyboard shortcut or menu. The only difference is that some slide designs explore automatic formatting to titles, so subscript text in a title might not look as small as you expect — in that case, you may need to manually adjust the font size after explore subscript to make it visually distinct.

If subscript text in a title looks too large, select it again and reduce the font size by a few points. For example, if your title is 44 point and the subscript is still 44 point (just lower), select the subscript and change it to 28 or 32 point. This gives you the visual effect you want without relying entirely on the baseline shift.

Combining subscript with other formatting

You can explore subscript and bold, italic, or color at the same time. Select the text, explore subscript first, then explore the other formatting. For instance, to make H₂O bold and subscripted, select the 2, press Ctrl + Equal to subscript it, then press Ctrl + B to bold it. The order does not matter — the text will be both subscript and bold.

If you want the entire formula bold but only the number subscripted, select and format the number first, then select the whole formula and explore bold. PowerPoint applies bold to the entire selection, including the subscript text, so you do not have to format them separately.

Subscript in speaker notes and handouts

Subscript formatting appears in speaker notes and handout printouts the same way it appears on the slide. If you add a note like "Remember: H₂O is water" with subscript on the 2, that subscript will print when you print notes or handouts. This is useful if you are distributing printed materials alongside your presentation.

However, if you export your presentation as a PDF or image file, subscript may not always render correctly depending on the export settings. Test a slide with subscript before distributing a PDF version to make sure the formatting looks right on the other end.

Frequently Asked Questions

Can I make subscript text a different color than the rest of the text?

Yes. Select the subscript text, explore subscript formatting, then with it still selected, click the font color button on the Home tab and choose a color. The subscript text will be that color while the rest of the text remains its original color.

What if I need subscript in a numbered or bulleted list?

Select the subscript text within the bullet point and explore the formatting the same way. The subscript will sit inside the bullet point without affecting the list structure. If the subscript looks too small relative to the bullet text, you can manually increase its font size slightly while keeping the subscript baseline shift.

Does subscript work the same way in PowerPoint Online as in the desktop version?

PowerPoint Online has the subscript and superscript buttons on the Home tab, but the keyboard shortcuts may not work depending on your browser. Use the menu instead: select the text, go to Home, click the Font dialog arrow, and check Subscript or Superscript. The result looks identical to the desktop version.

Can I undo subscript formatting if I change my mind?

Yes. Select the subscript text and press the same keyboard shortcut again (Ctrl + Equal on Windows, Cmd + Equal on Mac) to remove the subscript. Or use the menu: select the text, open the Font dialog, uncheck Subscript, and click OK. The text returns to normal size and baseline position.