How to add pictures to PDF annotations, what should I do if pictures cannot be moved?

Key points of this article

First determine whether the image is an annotation object or a page content: annotations can be selected individually and control points appear. Most of the images that select the entire page or have no response after clicking have been flattened.
Annotation images must be cropped before inserting. PNG is suitable for seals with transparent backgrounds. Photo images are recommended to be compressed before inserting.
When the image cannot be moved, first check whether it is locked or flattened, then check whether it is a full-page scanned image, and finally check whether the file has editing restrictions.
Pictures that are flattened into the page can no longer be moved as comments. They can only be undone and redone or returned to the source file and re-inserted.
Before saving or exporting, check whether the image is still there to avoid the other party not being able to see the annotations when opening it.

When reviewing PDFs, many people want to directly paste a screenshot, a stamp, or a diagram on a certain page instead of just writing a few text comments. After the picture is inserted, either the position does not match, or it does not move when dragged, or even cannot be selected. This type of problem is different from ordinary text annotations. The reason usually lies in how the image is entered into the PDF.

This article is written for people who need to annotate pictures on PDFs, such as readers who review contracts, correct design drafts, and add explanations to paper charts. After reading, you will be able to distinguish between "annotated pictures" and "flattened pictures on the page", know what to do when inserting, and what order to check when you encounter problems that cannot be moved.

One thing needs to be explained first: OmniDoc's PDF editor currently provides the ability to modify paragraph text, signature, form filling, blackout, page manipulation, OCR, comparison and export, but there is no separate insertion of image annotations. Most of the methods below are common practices and apply to common PDF reading and editing software.

🎯 If you want to insert pictures into PDF annotations, which method is suitable for you? One sentence conclusion

First determine whether the image is an annotation object or page content, and then choose a method. Most of the "immovable" problems can be avoided.

your situation	Recommended practices	reason
Temporarily post a screenshot for explanation	Insert using the image or stamp annotation tool of the reader	The picture remains in the annotation layer and can be moved and deleted without changing the original page.
Signature or seal required	Place using the signature feature of the OmniDoc PDF Editor	Signatures can be saved and reused, and their placement can be adjusted again.
Want the image to be part of the page	First insert the image into the source file and then export it as PDF	After the picture is written into the page content, it can no longer be moved as an annotation.
The page is a scan, and the entire page is a picture.	Use OCR to identify text first, and image issues will be dealt with separately.	OCR only recognizes text and does not turn images on the page into independent objects.
The picture cannot be moved	Undo and redo, or go back to the source file and reinsert it	Flattened images have no objects that can be selected individually

The focus is different in different situations:

Reviewing contracts or legal documents: Mainly focus on annotations. Pictures are only used for annotations. Keep the original documents to avoid being unable to retroactively modify them after they are flattened.
Correction of design drafts or charts: If the picture needs to be adjusted multiple times, give priority to using movable annotation objects. After the final draft, consider exporting the flattened version.
Fill in or sign the form: The signature and filled-in content should be saved separately. Use the signature function to sign, and keep the editable version of the form content.
Processing scanned documents: Obtain the electronic version of the original document first; only when the original cannot be obtained, OCR will be considered before marking, and the recognition results will be checked.

Before you start: Confirm these points first

1. The picture is an annotation or page content. Click the picture in the reader. If a selection box and four corner control points appear, it means that it is an independent annotation object and can be moved. If the entire page is selected or nothing happens after clicking, it has probably been flattened into the page and can only be undone or redone.

2. Source of PDF. PDFs exported directly from electronic documents usually retain the annotation layer; if you scan it after printing, or save the screenshot as a PDF file, the page content has been merged into one picture, and it is difficult to separate the annotations and pages. After getting the file, try to select a piece of text first. If you can select it, it means the text version, but if you can't select it, it is probably a scanned copy.

3. The format and size of the image itself. Seals or signatures with transparent backgrounds are suitable for saving as PNG; photo images are large in size and can easily slow down the file after being inserted. Trimming off the excess white edges before inserting can save a lot of post-production adjustments.

4. How the files will be circulated afterwards. If you want to send it to the other party, make sure that the other party's software can display comments. When many software export to scans or flatten PDF, annotations will be merged into the page and cannot be moved later.

Steps to insert image annotations into PDF

Open the original PDF and confirm that it is the text version. Try to select a text. If you can select it, you can follow the steps below; if you can't select it, go to step 4 first.
Get the pictures ready. Use a simple cropping tool to remove the white edges, save the image as PNG or JPG, and clearly indicate the purpose of the file name for easy retrieval later.
Find the image or stamp annotation tool. Different software has different names. Usually, in the annotation or insert menu, select the picture file to be inserted.
Click or drag out the area at the target location. First enlarge the page to a suitable ratio, then place the picture and align it with the text or diagram to be explained.
Resize and confirm that it can be dragged. Select the picture, drag the four corner control points to change the size, and move it again to confirm that it is an independent object.
Reused signatures or seals can be saved using the signature function. In the OmniDoc PDF editor, signatures can be saved and placed on different pages, eliminating the need for repeated insertion.
Save as new file. Keep the original file as a backup, mark the new file name as "Annotated", and then open it with another software for inspection.

The picture cannot be moved, please check in this order.

Step one: Undo and then check again. If a problem occurs just after inserting, undo it first to confirm whether it was a mistake.

Step 2: Check whether the picture is locked. Some software allows the annotation object to be locked, and cannot be dragged after being locked. Look for the option to unlock the object in the object's properties or right-click menu, which location may vary depending on the software.

Step 3: Determine whether it has been flattened. If there is no selection box after clicking the picture, or the entire page is selected, it means that the picture has become the page content. In this case, you can no longer drag directly, you can only undo and redo it, or go back to the source file and reinsert it.

Step 4: Check whether it is a scanned copy. The entire page of the scanned document is a picture, and wherever you click, the entire page is an object. In this case, the entire page is moved, not an inserted picture. The safest way at this time is to obtain the electronic version of the original document.

Step 5: Check file permissions. If editing restrictions are set on the file, images may not be added or moved and require authorization from the file owner or an editable version.

Check each item after completion

Check items	How to see	What to do if there is a problem
Picture location	Zoom in to the usual ratio and turn to the target page to see if the position is aligned.	Fine-tune with drag, or delete and reinsert
Can it be moved?	Click to select, drag once and then undo	Cannot be moved means it has been flattened, and the origin-pull file will be redone.
Sharpness	Zoom in to see if the edges are virtual and jagged.	Replace it with a higher resolution original image.
Whether to keep it after saving	Open a new file with another software and check if the picture is still there	Keep the annotations when saving; if the export is flattened, issue the original document instead.
Whether or not to cover the original text	See if the picture covers the text you need to read.	Zoom out of the picture or move away.

# frequently asked questions (FAQ)

1. Can I change the size after inserting the picture?

Yes. Select the picture and drag the four corner control points. If the picture has been flattened into the page, it can only be undone and re-inserted.

2. Why can't someone open my PDF and see the picture annotations?

The software used by the other party may not display annotations, or the annotations may be merged into the page when the file is exported. It is recommended to ask the other party to open it with software that supports annotations, or send the annotated version of the original file directly.

3. Can the scanned version of PDF be annotated with pictures?

The scanned piece itself is a picture, and the effect of adding annotations depends on whether the software supports it or not. If you need to find the text content, you can first use OCR recognition, the recognition results should be manually checked before use.

4. Can the signed picture be reused?

Sure. After using the signature function to save the signature in the OmniDoc PDF editor, you can put it in different files many times, and the specific operation shall prevail in the software interface.

# Summary

The key to adding pictures to PDF annotations is to distinguish whether the pictures are independent annotations or flattened page content. Cut the picture before insertion, make sure you can drag it alone after insertion, and check whether the picture is retained before saving. Most of the problems that "the picture cannot be moved" can be avoided.

Open OmniDoc and use the PDF editor to process your files