When you create a text box in Word, you’ll notice that is automatically creates a thin black border around the box. Many people want to know how to change or remove this border.
To change (or remove) the border, follow these steps:
Right-click on the text box and select Format Text Box.
Choose the Color drop-down menu. In this example, we’ve selected red.
Click OK to save the settings. Tip: Click No Line if you want an invisible border around the box.