Specifying the Part No. and Description cells as text fields
By default, the cells in tables are set as text objects.
Now you must set the Description column cell as a text field. Text
fields enable users to type, select, edit, cut, copy, paste, and
delete any of the text inside the field. (Text objects present read-only
text that end users cannot edit.)
Select the cell under Part No.
In the Object palette, click the Cell tab and in the Type
list select Text Field.