Format characters and paragraphs - apply styles to paragraphs

 Open Apply Styles task pane (Ctrl + Shift + S ) 

Open Styles task pane (Alt + Ctrl + Shift + S ) 

Start AutoFormat (Alt + Ctrl +K ) 

Apply the normal style (Ctrl + Shift + N ) 

Apply the Heading 1 style  (Alt + Ctrl + 1 ) 

Apply the Heading 2 style  (Alt + Ctrl + 2 ) 

Apply the Heading 3 style  (Alt + Ctrl + 3 )