The fastest way to add a line in Word

The quickest method is to use the horizontal line feature built into Word. Go to the Insert tab, click Shapes, select the line tool, then click and drag across your document where you want the line to appear. You can adjust its length, thickness, and color after you place it.

If you need a line that spans the full width of your page, use the Borders feature instead. Place your cursor in the paragraph where you want the line, go to Home, click the arrow next to Borders, and select Borders and Shading. Choose which edges get a border — top, bottom, left, right, or all four — and click OK.

For a simple underline beneath text, select the text and press Ctrl+U (Windows) or Command+U (Mac), or click the underline button in the toolbar.

Key Takeaways

  • The Insert Shapes method gives you a line you can move, resize, and color however you want.
  • The Borders method creates a line attached to a paragraph that moves with the text if you edit the document.
  • Horizontal lines work best for dividing sections; underlines work best for emphasizing specific words or phrases.
  • You can change a line's thickness, style (solid, dashed, dotted), and color after you create it.

Using the Insert Shapes method for custom lines

Open your Word document and click where you want to place the line. Go to the Insert tab at the top of the screen. Click Shapes — it looks like a small rectangle icon — and a dropdown menu appears showing different shape options.

Scroll down to find the Lines section. Click the straight line tool (the first option, which looks like a diagonal line). Your cursor changes to a crosshair. Click and drag across your document to draw the line. Release the mouse when the line reaches the length you want.

Once the line is placed, it stays selected. Right-click on it to open a menu where you can choose Format Shape. Here you can change the line's color, thickness (called "Weight"), and style (solid, dashed, dotted, or other patterns). You can also move the line by clicking and dragging it, or resize it by dragging the small circles at each end.

Using borders to attach lines to paragraphs

Borders are lines that stay connected to a paragraph, so if you add or delete text, the line moves with it. Click anywhere in the paragraph where you want a border. Go to the Home tab and find the Borders button — it looks like a small square with lines around it.

Click the small arrow next to the Borders button to see options. You can choose Top Border, Bottom Border, Left Border, Right Border, or Borders and Shading for more control. Most people use Bottom Border to create a line under a heading or section title.

If you want to customize the line's thickness or style, click Borders and Shading instead. A dialog box opens where you can choose the line style (solid, dashed, dotted), the thickness in points, and the color. You can also preview exactly where the border will appear on your page before you apply it.

Changing line thickness, color, and style

If you used the Shapes method, right-click your line and select Format Shape. On the left side of the panel that opens, click Line. Here you can adjust the Width (thickness) by typing a number or using the slider. The default is usually 2.25 points; thicker lines are more visible, thinner lines are more subtle.

To change the color, click the Color option in the same panel and pick from the color palette. You can also choose a Dash type — solid, square dot, round dot, dash, or combinations — to change how the line looks. Some people use dashed lines to separate sections without making them feel as heavy as a solid line.

For borders created with the Borders feature, right-click the paragraph and select Borders and Shading, or go to Home and click the arrow next to Borders, then select Borders and Shading. The same options for style, width, and color appear in the dialog box.

When to use lines versus other dividers

A horizontal line works well for breaking up long documents into visual sections — for example, between chapters, between a header and body text, or before a signature line. Lines are cleaner than typing a row of dashes or underscores.

Underlines are best for emphasizing individual words or short phrases within a sentence. They draw attention without breaking the flow of reading. Use underlines sparingly; overusing them makes a document look cluttered.

Borders around entire paragraphs or tables create a contained box that highlights important information. This works well for callout boxes, warnings, or key points you want readers to notice. Borders also work for creating forms where people need to fill in blanks.

Troubleshooting common line problems

If a line you created with Shapes disappears when you print or save the document, check that it is not set to "No Fill" and "No Line" in the Format Shape menu. Make sure the line color is not white (which would be invisible on a white page). Also check that the line is not behind text — right-click it and select Arrange, then Bring to Front.

If a border line is not showing up, the paragraph might have a white background color covering it. Right-click the paragraph, select Borders and Shading, go to the Shading tab, and make sure the fill color is set to No Color. If the line still does not appear, try increasing the line width to make it thicker.

If you want to remove a line you created with Shapes, click it and press Delete. To remove a border, click in the paragraph, go to Home, click the arrow next to Borders, and select No Border.

Frequently Asked Questions

Can I make a line that spans only part of the page width?

Yes. Use the Shapes method to draw a line of any length you want. You can also use a table with one row and one column, then add a border to just the bottom of that cell — this creates a line that is only as wide as the cell.

How do I add a line between columns in Word?

If you are using a two-column or multi-column layout, go to Layout, click Columns, select More Columns, and check the box for Line between columns. Word automatically adds a vertical line between each column.

What is the difference between a line and an underline?

An underline is applied directly to text and moves with that text if you edit. A line created with Shapes is a separate object that stays in one place unless you move it. Underlines are for emphasizing words; lines are for dividing sections or creating visual structure.

Can I make a line dashed or dotted instead of solid?

Yes. For Shapes lines, right-click and select Format Shape, then click Line and choose a Dash type. For borders, right-click the paragraph, select Borders and Shading, and choose a line style from the Style list.

How do I add a line to a table cell?

Click inside the cell, go to Table Design (which appears when you click inside a table), and use the Borders options to add lines to specific cell edges. You can also right-click the cell and select Borders and Shading for more detailed control.