1. Again, open the document first. This time, we chose to insert at the top.

2. Put the cursor behind the title, and then click the bookmark at the top, as shown below.

3. Enter anything, and then click Add to define the bookmark name here. Repeat steps 2 and 3 three times as shown below.

4. Finally, return to the directory again, and you can see that the path is back to normal, as shown in the figure below.