How do you get your cursor to turn into a vertical line in a text box?

To make your cursor turn into a vertical line (also known as an I-beam cursor) in a text box, simply place your mouse pointer over the text box where you want to type. The cursor will change automatically to the I-beam shape, indicating that you can start typing or select text. If you're using a touch device, tapping the text box will usually bring up the keyboard and place the cursor at that location.