To pin and unpin documents in a Word document follow the following steps.
1.Open a word doucment
2. Click the file tab
3. Go to file recent.
4.You will see your recent documents on the right hand side of the page
5. the icons on the right side will look like a pin.
6. Click the pin to pin the doucment when completed the pin will appear blue
7. Click the pin to unpin the document the color will be removed.