How do I make my scanned Volunteer Diary searchable in Acrobat?

First, open your scanned diary in Acrobat. Go to 'All tools' and select 'Scan & OCR'. Choose 'In this file' and then 'Recognize Text'. Acrobat will add a searchable text layer, allowing you to find words in your diary.

What is the difference between a scanned PDF and an OCR'd PDF?

Feature Scanned PDF OCR'd PDF. Content An image of the original document. An image with a hidden, searchable text layer. Searchability Not searchable (like a photo). Fully searchable (you can find words). Editing Cannot select or copy text directly. Can select and copy text from the hidden layer. File Size Can be larger if not optimized. Slightly larger than image-only but highly functional.

Volunteer Diary Scanning in Adobe Acrobat — How-to & AI prompts

AI prompts

1 way to ask · copy any one

CDecide — “help me choose”We booked the [reading room] and [volunteers] for tomorrow to scan fragile 1870s [diaries]…+

We booked the [reading room] and [volunteers] for tomorrow to scan fragile 1870s [diaries] because a course needs images next week. I’m uneasy: the diaries are brittle, and I’m not confident my scanning plan protects the bindings or produces usable text. I don’t know whether to use contact sheets, overhead shots, or outsource one folder to conservation. Diagnose the immediate risk and tell me the single safe workflow to run tomorrow that keeps the originals intact and gives me searchable files; name the one conservation person or [vendor] I should call if something looks worse than expected.

when the reply comes backPush once: ask it to sharpen the weakest part, and to say what it assumed.

How to do it

the tool · the steps · what to avoid

1
Open the scanned course material PDF in Adobe Acrobat Pro.
2
Select Tools from the global bar in the upper left.
3
Scroll down and select Scan & OCR.
4
Click Recognize Text and choose In This File.
5
Set the language to match the document's primary language for best accuracy.
RecommendationSelecting the correct language improves OCR results, especially for non-English texts.
6
Click Recognize Text to start the OCR process.
7
After OCR completes, select Tools again, then choose Accessibility.
RecommendationRunning the accessibility checker helps ensure that the PDF is usable by screen readers.
8
Follow the guided steps to address any accessibility issues flagged by Acrobat.
9
Save the PDF with a new filename to preserve the accessible, searchable version.
Best practiceFor best OCR accuracy, scan documents at 300 dpi and avoid skewed or blurry pages.

In the appWith the API

After OCR, use the accessibility checker to ensure your scanned readings are fully usable by all students.

This runs in the Acrobat app - there is no separate API for this task.

Glossary

words on this page

OCROCR stands for Optical Character Recognition. It is technology that turns images of text into real text you can search and copy.ExampleAfter scanning a paper invoice, OCR allows you to copy the vendor's name from the image.

DPIDPI means dots per inch, and it tells you how clear an image is when it is scanned.ExampleA scanned photo saved at 300 DPI will usually contain more detail than the same photo at 72 DPI.

Searchable LayerA hidden layer of text added to an image-based PDF, allowing you to search for words within the document.ExampleThe hidden searchable layer in the scanned contract allowed us to find specific clauses.

The real tasks

the one, listed here

Volunteers arrive tomorrow to scan fragile 1870s diaries for a digitization request from an undergraduate course

FAQ

about this task

First, open your scanned diary in Acrobat.
Go to 'All tools' and select 'Scan & OCR'.
Choose 'In this file' and then 'Recognize Text'.
Acrobat will add a searchable text layer, allowing you to find words in your diary.

OCR, or Optical Character Recognition, is a technology that converts images of text into actual text data. It's important for scanned documents because it makes them searchable and editable. Without OCR, a scanned document is just a picture, but with OCR, you can easily find specific words or phrases, making it much more useful for archiving and research.

If your scanned diary pages are blurry, OCR might struggle to recognize the text accurately. Blurry images reduce the clarity of characters, which can lead to errors in the text recognition process. To improve accuracy, try to rescan the pages at a higher resolution, like 300 dpi, and ensure the original document is flat and well-lit during scanning. The clearer the image, the better OCR will perform.

Acrobat shows the 'page contains renderable text' message because the page already has real, selectable text. The OCR feature is designed to work on pages that are only images, turning picture-based text into searchable text. If a page already has text, Acrobat doesn't need to perform OCR. You should check if the text is already searchable before trying to run OCR again.

Feature	Scanned PDF	OCR'd PDF
Content	An image of the original document.	An image with a hidden, searchable text layer.
Searchability	Not searchable (like a photo).	Fully searchable (you can find words).
Editing	Cannot select or copy text directly.	Can select and copy text from the hidden layer.
File Size	Can be larger if not optimized.	Slightly larger than image-only but highly functional.

Volunteer Diary Scanning

When to use it

AI prompts

How to do it

Glossary

The real tasks

Who does this

FAQ

Sources

Adobe help

When it fails