If you find yourself in frequent need of Word’s change case feature and you are not a big fan of keyboard shortcuts (or simply have a hard time remembering them all), there is another way to make these changes more accessible.
If you are using Word 2007, you can add Change Case options to the QAT (Quick Access Toolbar). As a matter of fact, you can add up to three of them. To add commands to the QAT, click the drop down arrow at the right end of the toolbar.

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Select Customize Quick Access Toolbar. Under Choose Commands From, select All Commands. Choose the change case command, or commands, you want to add to the QAT.
The first change case command is Change Text Case, which toggles through the same three cases as the Shift+F3 keyboard shortcut. The second is Change Case Gallery, which will display the same list as the drop down from the ribbon. The third is called Change Case Dialog Classic, and it offers the same options as the gallery, only it looks like the “old school” dialog of Word 2003.
Select the option(s) you want and click Add to send them to the QAT.
If you are using Word 2003 or earlier, you have some choices as well. You can add a Change Case button (or two) to the toolbar. To do so, right click the toolbar and click Customize. Go to the Commands tab. Under Categories, select Format.

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Go to the Commands box and scroll down. There are two Change Case options listed. The first one toggles through the three standard cases (just like Shift+F3). The second one, which displays three letter A’s in differing sizes, will open the Change Case dialog box.

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Select the one you want to use. Click on it, drag it to the end of the main toolbar and drop it there. Now all you need to do is select the word or words you want to change and click the button.