Text boxes in Word are used to draw attention to specific text. Use a Word text box to add definition and make it stand out.
Text boxes are useful for helping to organize your document. They are basically treated the same as shapes, so when you insert a text box you can format it by changing its fill color, outline color, and shape style, as well as create WordArt and add 3D effects.
From the drop-down menu, you can also select one of the built-in text boxes that have predefined colors, fonts, positions, and sizes. If you choose this option, the text box will appear automatically so you will not need to click and drag to draw it.
If you drag the sizing handles on any of the four corners, you will be able to change the height and width at the same time. The sizing handles on the top or bottom of the text box will only allow you to resize vertically, while the handles on the left and right sides will resize the text box horizontally.