Describe what stays
Select the page or image you want to revise. Identify the subject, crop, palette and any exact wording that should survive. A request about one object is easier to review than a request to improve everything.
Review the proposed edit
Check the affected page and image quote. Compare the revised artwork with the original, paying attention to lettering, faces and the boundary of the edited region.
Keep editable detail separate
Use a native text layer for frequent updates such as a date or price. Review the complete slide with its surrounding pages before applying the proposal.
Example brief
When should I regenerate the artwork?
If a label sits in a clear area, an editable text overlay is easy to change later. If old lettering crosses a patterned surface, inspect the repaired background at full size before accepting a revision.