In the (1) Schematic document > (2) Document tab > (3) Draw panel, click Text .
In the dialog box, review and adjust any settings for text size and font.
Enter the text string in the box. After any value change press Enter.
In the design, click to place instances of the text string. Note that you can right-click to rotate the text by 90 degrees, and you can click Mirror in the dialog box to move the text handle from one end of the string to the other.