To Edit Text That Contains Enter Data Fields Using the Dialog Box Editor

Select Edit Text ( Drawing > Annotate > Text > Edit Text ).
Do one of the following:

Enter a data point to select the text element to edit.

or
Double-click a text element.
To edit the constant text, simply make your edits in place.
(Optional) To edit the value and length of an enter data field, modify the characters inside the delimiters (<< and >>).