How to Flatten Comments, Signatures, Stamps, and Annotations

How to Flatten Comments, Signatures, Stamps, and Annotations (Quick Answer)

You can flatten comments, signatures, stamps, and annotations by using a PDF tool that turns those elements into part of the page content.

That is useful when you want:

• A final review copy
• A file that is harder to edit
• Cleaner printing behavior
• Fewer moving parts in the document

Always keep an editable original first.

What Flattening Does to Markup

Flattening usually merges markup into the page.

That means the PDF may no longer treat the items as separate objects.

Depending on the file, flattening can affect:

• Comments
• Highlight annotations
• Stamps
• Drawn signatures
• Form fields

If you still need to move or edit the items later, do not flatten yet.

Use Flattening Carefully

Flattening is helpful for final versions, but it removes flexibility.

That is why it is best used when:

• Review is finished
• The file is ready for delivery
• You want a more stable print output

If more edits are coming, keep the annotations live for now.

Save a Final Copy

Before flattening, make sure you have:

• The original file
• The reviewed file
• The final flattened copy

That makes it easier to compare versions and recover content if needed.

Best Practice Summary

If you want the short version:

• Flatten only after review is complete
• Keep the editable original separate
• Check comments, signatures, and stamps after flattening
• Save the final copy under a new name
• Test the output in another viewer if the file matters

That is the simplest way to flatten comments, signatures, stamps, and annotations.

FAQ

Does flattening remove comments?

It usually merges them into the page so they are no longer separate comments.

Will stamps still be visible?

Often yes, but they may no longer be movable.

Does flattening affect signatures?

It can, depending on the type of signature and the workflow.

Should I flatten before final sharing?

Yes, if you want a final fixed copy.

Can I flatten only some annotations?

Sometimes, depending on the PDF tool.

Is flattening reversible?

Usually not in the same file, so keep the original.