Select the Window with the text annotation that you want to edit.
Under the Drawing pull-down, select Text Annotations, Edit. All text annotations in the Window are now selected. This is indicated by the four handles surrounding each text phrase.
If there is more than one text annotation in the Window, click on the one which you want to edit.
Edit the text in the command line, and press [Enter].
Press [Esc] to exit from Annotation mode.