word2013 Remove the header line as follows:
Step one: Under our Start menu, click the arrow in the lower right corner of the format.
Step Two: Select the header in the pop-up dialog box
Step Three: Click "Modify" and select the format in the next dialog box
Step four: Select a border
Step five: Next we see a lot of different kinds of header patterns, where we'll choose the borderless
Step six: Back to the front page again, we found that the line on the header is gone.