The method of adding words to underline in WPS to make it fixed;

Open the Word document of WPS, click Insert and Shape on the menu bar, and then select the "straight line" icon in the shape;

Hold down the shift key to draw a straight line at the beginning of the underline, and then change the color of the line to black with a size of 0.75 points;

In this way, when you edit the text on the horizontal line, the "underline" will not appear.