# PowerPoint hidden-content exercise

Inspect the real source deck and compare a counterpart containing only the intended visible content and chart data.

Entirely synthetic PPTX files. Known canaries were checked structurally; no customer deck or AI upload was used.

Source: https://aona.ai/resources/guides/powerpoint-hidden-content-ai-upload/
Sources checked: 2026-09-21

## Three hidden-content locations

### Speaker notes

A genuine note attached to slide 1

Note: Not visible on the slide canvas

### Hidden slide

Slide 3 remains in the source package

Note: Hidden is not deleted

### Embedded workbook

A non-plotted canary in hidden row 99

Note: Visible bars do not show every cell

| Known canary | Location | Reviewed-copy state |
| --- | --- | --- |
| Notes marker | Slide 1 speaker notes | Absent |
| Hidden-slide marker | Hidden slide 3 | Absent |
| Embedded-data marker | Workbook hidden row 99, cell Z99 | Absent |

## Review checklist

- [ ] Inspect a copy of the editable file
  Review notes, hidden slides and the underlying chart workbook rather than only slideshow output.
- [ ] Review limitations and retained embedded data
  Keep intended editable chart values while checking for unrelated cells or hidden content.
- [ ] Identify the exact prepared file
  Reopen it and record what was removed or retained before an authorised upload.

## Included example files

- README.md
- synthetic-hidden-content.pptx
- synthetic-reviewed-copy.pptx
- source-visible-chart.png
- reviewed-visible-chart.png
- inspection-record.csv

## Source references

- Microsoft: Inspect documents for hidden data: https://support.microsoft.com/en-us/office/collab-files/remove-hidden-data-and-personal-information-by-inspecting-documents-presentations-or-workbooks (2026-09-21)

Use the worksheet within the relevant legal, contractual and technical scope. It is not a certification or a record of an installed-product test.