How to add cell phone underline?

Select the text you want to underline, and then click either of the two red boxes in the picture.

Select text to open the word document, and select the text to be underlined. Select Underline Select the underline icon in the start menu bar, and then click the small black triangle.

Set Underline Select the underline style on the pop-up page, click the mouse to select it, and underline the text successfully.

Please note that you can continue to add underscores by pressing the space bar on your keyboard. If you no longer use the underline function, please click the underline icon again to cancel the success.