Shortcut key to Change text to heading 1
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Ctrl + Alt + 1
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Ctrl + Alt + H
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Ctrl + H
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Shift + 1
A
Correct answer
Explanation
Ctrl+Alt+1 applies the Heading 1 style to text in Microsoft Word. Using the number keys 1-6 with Ctrl+Alt corresponds to different heading levels. Ctrl+H is for find and replace, Shift+1 types the exclamation mark, and Ctrl+Alt+H is not a heading shortcut.