The fastest way to change all caps to lowercase

Open your document in Microsoft Word and select the text you want to change. Highlight the words by clicking at the start, holding down your mouse button, and dragging to the end. If the text is already selected, you can skip this step.

Go to the Home tab at the top of the window. In the ribbon, find the button labeled Aa with a small arrow next to it — this is the text case button. Click the arrow to open a menu with five options: Sentence case, lowercase, UPPERCASE, Capitalize Each Word, and tOGGLE cASE. Click lowercase to convert your selection.

Word applies the change when ready. If you need to undo it, press Ctrl+Z on your keyboard or click the undo arrow at the top left.

Key Takeaways

  • The text case button is on the Home tab in the ribbon, marked with Aa and a dropdown arrow.
  • You must select the text first — click and drag to highlight the words you want to change.
  • Word offers five case options: lowercase, UPPERCASE, Sentence case, Capitalize Each Word, and tOGGLE cASE.
  • The change happens when ready, and you can undo it with Ctrl+Z if you change your mind.
  • This method works the same way in Word for Windows, Word for Mac, and Word Online.

Selecting text before you change the case

You cannot change the case of text unless you select it first. Word needs to know which words you want to affect. Click at the very beginning of the first word you want to change, then hold down your left mouse button and drag to the end of the last word. Release the mouse button. The selected text will appear highlighted in blue.

If you want to select all the text in your document at once, press Ctrl+A on your keyboard. This selects every word from the beginning to the end. You can then explore the case change to the entire document in one step.

For a large block of text, you can also click at the start, then hold Shift and click at the end. Word will select everything between those two points. This method is faster than dragging if the text spans multiple pages.

Using the case button on different versions of Word

The location and appearance of the text case button varies slightly depending on which version of Word you use. In Word for Windows (2019, 2021, and Microsoft 365), the button is on the Home tab in the ribbon, labeled Aa with a dropdown arrow. In Word for Mac, the button is in the same location on the Home tab.

Word Online, which runs in your web browser, has the same button in the same place. If you do not see the Aa button on your Home tab, your ribbon may be collapsed. Click the arrow or expand button at the right side of the ribbon to see all formatting options.

Older versions of Word (2010 and earlier) do not have the text case button in the ribbon. Instead, go to the Format menu, select Text, and then choose Change Case. A dialog box will open with the same five options. Select lowercase and click OK.

What happens when you change case in Word

When you click lowercase, Word converts every capital letter in your selection to a lowercase letter. A word like HELLO becomes hello. A word like HeLLo also becomes hello. Word does not preserve the original capitalization pattern — it applies the same rule to every letter.

The change affects only the letters themselves, not spacing, punctuation, or formatting like bold or italics. If you had text that was bold and all caps, it will be bold and lowercase after the change. The font, font size, and color stay the same.

Word treats this as an edit to your document, so the change appears in your undo history. If you realize you made a mistake, you can press Ctrl+Z to revert to the original text. You can undo multiple steps if you need to go back further.

Changing case in specific situations

If you have a title or heading in all caps and want to change only that line, select just that line before opening the case menu. Word will change only the selected text, leaving the rest of your document untouched.

If you have mixed case text like "tHiS iS mEsSy" and want to fix it, the lowercase option will convert it to "this is messy". If you want the first letter of each word to be capital instead, select the text and choose Capitalize Each Word from the case menu. This gives you "This Is Messy".

For a sentence that should start with a capital letter and have lowercase everywhere else, use Sentence case. This converts "THIS IS A SENTENCE" to "This is a sentence". Word recognizes periods and other punctuation marks as sentence endings and capitalizes the letter after them.

Fixing all caps text in a long document

If your entire document is in all caps and you want to convert it to normal case, press Ctrl+A to select everything. Then click the case button and choose lowercase. Word will convert the entire document in seconds.

After converting to lowercase, you may need to fix the capitalization of proper nouns and the first word of sentences. Word's case tools do not recognize names or sentence structure — they only follow the rule you choose. You can use Find and Replace to fix common words, or manually edit sections that need attention.

If you have a very large document with many proper nouns, consider converting a small section first to see how much manual cleanup will be needed. This helps you decide whether to convert the whole document at once or work through it section by section.

Keyboard shortcuts for changing case

Word does not have a single keyboard shortcut that works across all versions for changing case. The case button in the ribbon is the most reliable method that works the same way everywhere. However, some users find keyboard shortcuts faster once they memorize them.

In Word for Windows, you can press Shift+F3 to cycle through case options. Select your text, then press Shift+F3 repeatedly to move through UPPERCASE, lowercase, and Capitalize Each Word. Each press moves to the next option. This works in Word 2010 and later versions.

In Word for Mac, Shift+F3 also cycles through case options, but the order may differ slightly. Test it with a small selection first to see which option appears in which position. If Shift+F3 does not work on your Mac, use the case button in the ribbon instead.

Frequently Asked Questions

Can I change case without selecting the text first?

No. Word requires you to select text before explore a case change. If you do not select anything, the case button will be grayed out and you cannot click it. Highlight the text you want to change, then open the case menu.

Does changing case affect formatting like bold or italics?

No. The case change affects only the letters themselves. If text is bold and all caps, it will be bold and lowercase after the change. All other formatting stays the same.

What is the difference between lowercase and Sentence case?

Lowercase converts every letter to lowercase: "this is a sentence". Sentence case capitalizes the first letter after a period or other sentence ending: "This is a sentence." Use lowercase when you want all letters small, and Sentence case when you want normal sentence capitalization.

Can I undo a case change if I change my mind?

Yes. Press Ctrl+Z when ready after the change, or click the undo arrow at the top left of the window. You can undo multiple steps if you need to go back further. Once you save and close the document, you cannot undo changes from a previous session.

Does the case button work the same way in Word Online?

Yes. Word Online has the same case button on the Home tab in the same location. Select your text, click the Aa button with the dropdown arrow, and choose lowercase. The process is identical to Word for Windows and Mac.