How to flatten a PDF
- Finish your entries first
Flattening is one-way. Nothing typed into a field can be edited afterwards.
- Flatten
Fields, highlights, stamps and comments are all drawn into the page.
- Open the result
Confirm every answer is visible. This is the moment to catch a field that was empty.
- Submit the flattened copy
Keep the editable original in case you need to change something.
Why this matters for exam and study documents
Coursework cover sheets are usually PDF forms. Submit one unflattened and the marker may open it in a reader that shows every field blank - a genuinely common way to be recorded as having submitted nothing.
What is kept, what changes, and what this will not do
These are the tools that genuinely alter a document rather than rearranging it, so the trade-offs are real and worth reading before you delete the original.
Kept
- The visible appearance of every field and annotation
- Page count, size and order
- The text layer of the original document
Changed
- Form fields stop being editable
- Annotations can no longer be selected, moved or deleted
- Interactive elements such as buttons stop functioning
Limits
- This cannot be undone. Keep the original.
- Flattening does not remove text; use Redact PDF for that.
Questions and answers
Why would a marker see my form as empty?
Some readers only draw a field's live value, not a stored appearance, and some older ones ignore fields entirely. Flattening removes the question by making the answer part of the page.
Does flattening hide anything?
No. It makes things visible permanently. If you need text gone rather than fixed, that is redaction, and it is a different tool.
Can I edit a flattened form?
No. That is the point of it. Keep your editable copy.