1. Select the document you want to amend, then click Edit.
2. Right-click the field you want to remove, then click Delete.
3. On the menu bar click Report then click Report Properties.
4. Enter a new name and click OK. 
5. On the menu bar click File, click Save As.
6. Enter a new file name then click Save.
7. On the menu bar click File, then click Exit.

Watch the video

We've got a short video demonstrating this process, check it out: