Add a border to some text
Same goes with the text in your documents. You can choose to border individual words, lines, or even whole paragraphs. Just how plain or fancy you want to make those borders is up to you.
Select a word, line, or paragraph.
Click Home > Borders >the arrow next to Borders.
Choose the type of border you want:
Customize your text’s border
After you’ve selected your text and found the basic type of border you’d like, click the arrow next to Borders button again and then click Borders and Shading.
The box that opens shows you all the choices you can make for your border: Setting, style, color, width.
You can change the border around your text at any time or you can remove the border from your text altogether.