To add text to your sketches:
Click and drag the mouse to define a text box area in the sketch.
Enter text in the text editing window, and click OK when you are done.
Select formatting options from the tool bar.
Tip: The default text box is lined. If you do not want the text box to have a border around it, right-click the text box, click Line Color and then click None.
To edit text content:
Click the Selection tool .
Double-click the text box in the sketch.
Make your changes in the text editing window and click OK.