Borders and rules can be created in different ways, so if you’re not sure how one was added, you can try these methods to remove it.
Click the line or border to select it.
Do one of the following:
If selection handles appear at the ends of a line: It was added as a shape. Click Delete on the keyboard.
If selection handles appear around the border: It was added as a shape. Click the Style tab at the top of the sidebar on the right, then click the pop-up menu to the right of Border, then choose No Border.
Note: If you see a small x at the corners of a border or at the ends of a line, the shape is locked. You need to unlock it before you can remove it.
If no selection handles appear at the ends of a line: It was added as a rule. Select the text above the rule, then click the Layout button near the top of the Format
sidebar on the right. If the pop-up menu in the Paragraph Borders section says None, select the text below the rule. Click the pop-up menu, then choose None.
If no selection handles appear around the border: It was added as a border. Select the text inside the border, then click the Layout button near the top of the Format
sidebar on the right. Click the line type pop-up menu in the Paragraph Borders section, then choose None.
If you can’t select or delete a border or rule using any of the methods above, it may be a section layout object placed on the background of a template. To make it selectable, choose Arrange > Section Layouts > Make Layout Objects Selectable (from the Arrange menu at the top of your screen).