How to rotate PDF page orientation and save it without messing up the page

Key points of this article

First find the page numbers that are lying horizontally or upside down, and only rotate these pages, leaving the rest of the pages as they are, so that the layout will not be modified.
Rotation is to rotate the page content; if you just want to make the paper wider but the content does not move, then it is a page size problem and needs to be dealt with separately.
Scanned documents are still images after rotation. To search and copy text, you need to perform OCR after rotation and check the recognition results.
Save as a new file after rotation, keep the original, preview page by page before saving, and check the page number, orientation and signature position after saving.

If you open a PDF and find that some pages are sideways or the entire page is upside down, it will be difficult to read. Many people subconsciously use another software to convert the format. As a result, the text is misplaced and the tables are disconnected, which makes it even more messy. In fact, most orientation problems only require rotating the page itself and do not require changing the file format.

This article is written for people who need to adjust the orientation of PDF pages. For example, the paper author receives a landscape chart page, the scanned contract orientation is reversed, or someone who wants to unify the entire document into landscape orientation. How to convert PDF to landscape orientation? The key is to first identify which pages have the problem, and then only change these pages. After reading, you will know how to determine which pages need to be rotated, how to complete the rotation in the OmniDoc desktop client, and how to check after saving.

How to change the orientation of a PDF without messing it up? One sentence conclusion

Only rotate the problematic page and save it as a new file. Do not convert the PDF to another format and back again.

your situation	Recommended practices	reason
Some pages are placed horizontally or upside down, and the rest of the pages are normal	Select only these pages to rotate	The remaining pages remain as they are and the layout is not affected.
The entire document must be aligned horizontally	Rotate all pages to the same angle and save them	One operation is completed and the direction is unified
The scanned document is in the wrong direction	Rotate the entire page and do OCR if necessary	The scans themselves are images that are rotated to obtain searchable text via OCR
I just want to view it temporarily and don’t want to change the file.	Display with temporary rotation of reader	Does not write to the file and will be restored after closing
Convert to Word and then modify	Rotate and correct first, then export	After exporting in the correct direction, tables and paragraphs will be less likely to be misplaced.

Before you start: Confirm these points first

Distinguish whether the content is crooked or the paper needs to be wider. Rotation is to turn the page content 90 degrees or 180 degrees. If you just want to swap the width and height of the paper without changing the content, that is a page size issue that is not covered in this article.
Determine whether it is a scanned copy. Drag and select a piece of text on the page. The text version can be selected and copied; the entire picture can only be selected, most likely a scanned copy. Scans can also be rotated, but to search and copy text, you need to do OCR first.
Back up the original file. It is recommended to save as a new file after rotation and keep the original. When a problem occurs, you can go back to the original and reprocess it.
List the page numbers to be changed. Go through the document and write down the page numbers that are laid out horizontally or upside down. There is a list before page selection, which can reduce the chance of selecting normal pages by mistake.
Confirm whether you really want to unify the direction. There are often some horizontal charts in papers or contracts. Do not rotate them all at once, otherwise the normal vertical pages will be rotated.

Steps to rotate PDF pages in OmniDoc desktop client

The following steps apply to the OmniDoc desktop client, available for Windows, macOS, and Linux, available for download at download.omnidoc.top.

Open PDF. Open the file that needs to be adjusted in the desktop client and confirm that the page preview can be displayed normally.
Enter the PDF editor. The PDF editor provides page manipulation functions, including rotation.
Select the page that needs to be rotated. If you only want to change the horizontal orientation of a few pages, select only these pages; if you need to unify the orientation, select all of them.
Perform rotation. Select Rotate in the page operation and rotate according to the actual situation of the page. Turn it 90 degrees once to see the effect. If the direction is wrong, continue to adjust. If the page is upside down, you can turn it one more time.
Page by page preview. Look through each page to confirm that the horizontal page is correct and that no other pages have been redirected by mistake.
Save as new file. When saving, choose Save as a new PDF and do not overwrite the original.
Scan the document for OCR. If the original document is a scan and you want to search and copy text, perform OCR after the rotation is completed, and then check the recognized text.
Export when needed. If you also want the Word, Excel or PowerPoint version, wait until the orientation correction is completed before exporting.

Check each item after completion

Check items	How to see	What to do if there is a problem
Is the number of pages correct?	Compare the number of pages in the original document and the new document	If the number of pages is low, first check whether they were deleted by mistake; you can use the comparison function to compare the two PDFs.
Is the direction uniform?	Flip through from beginning to end to see if the horizontal pages only appear where they should.	The wrong page is re-selected and rotated back.
Whether the content is complete or not	Check whether the tables, pictures, headers and footers are fully displayed.	If trimming occurs, go back to the original and re-rotate, do not repeatedly overlay and rotate on the saved file
Whether the text is optional	Drag and select text on the page to see if you can copy it.	If the scanned piece is not recognized, check it again after OCR, and check the text against the original page.
Sign and fill in the contents	A page with a signature or form to confirm that the content is still in its original location	If you are in the wrong position, go back to the original, reprocess it and save it.

# frequently asked questions (FAQ)

1. Will rotating the page change the text content?

No, I won't. Rotation only changes the display direction of the page and the saved direction, and the text and picture themselves remain the same.

2. I just want the PDF to be displayed horizontally. I don't want to change the file, okay?

Sure. Many readers support temporary rotation display, which only affects the current view and does not write to the file after closing. Only when you need to save the orientation for a long time do you need to save after rotation.

3. Can you still search after the scanning piece is rotated?

The essence of a scanned piece is a picture, but it is still a picture after rotation. Searching and copying text requires OCR first. The recognition result of OCR may be wrong, and the important contents should be checked against the original page.

4. Why is it not recommended to switch to Word and then back to PDF?

Each format conversion may change the position of paragraphs, tables and fonts, and the direction problem is solved by conversion, which can easily lead to new layout confusion. It is safer to rotate the page directly.

# Summary

PDF direction is wrong, first determine which pages are wrong, just rotate these pages and save as a new file, and then check the number of pages, direction and content item by item. This can not only solve the problem of horizontal placement and inversion, but also keep the rest of the pages uncluttered.

Open OmniDoc and use the PDF editor to process your files