How to: Edit a linked object.
Solution:
Select the 'Edit' menu, select 'Linked Document Object', and select 'Edit' again.
1) Select the 'Edit' menu and select 'Linked Document Object'. (Another pull down menu appears.)
Edit Linked Document Object
2) Select 'Edit'. (The source application appears.)
3) Make the desired changes.
4) Select the 'File' menu and select 'Save'.
5) Select the 'File' menu and select 'Exit'. (PowerPoint reappears with the desired changes.)