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How to Add Notes to a PDF

Do you wish to learn how to add notes to a PDF? Teachers and students can gain the advantage of writing notes in PDF files to remember small concepts on different topics. In simpler words, sticky notes help in organizing and expanding information. In this article, we will analyze the following aspects to learn how to add sticky notes in PDF.

Part 1. How to Add Notes on PDF Windows 10/11

Method 1. Add Notes to PDF with UPDF

UPDF is a free PDF Reader and annotator, which is compatible with Windows, Mac, iOS, and Android. It is easy to make annotations on PDF using UPDF. Let's look at how to add notes to PDF with UPDF on Windows.

Step 1. Import PDF File

Firstly, you need to open your PDF file with UPDF by clicking the "Open File" button on the Home page.

open pdf with updf

Step 2. Add Notes to PDF

Now you can tap on the "Comment" icon on the top and then click the "Sticky Note" icon. After that, you can enter the reviews in the pop-up window.

add notes to pdf

Method 2. Add Notes to PDF with Nitro PDF

Nitro PDF Pro is a proficient tool for seamlessly editing and annotating PDF files. The PDF annotator of Nitro PDF Pro is universally compatible with all the PDF programs. You can easily add comments via sticky notes in your PDF and make communication easy.

The Annotator is also packed with intelligence. One can auto-detect image and text differences between different versions of a document. Moreover, you can review and collaborate on projects with the best editing and formatting PDF tool. Learn how to add sticky notes in PDF with Nitro PDF pro by following the given steps:

Step 1: Open the Nitro PDF Pro application and import the PDF file. Access the “Review” tab and further tap on the “Add Note” option from the “Markup” panel. Now, click on the page where you want to add a note. A yellow speech bubble will appear in that place.

Step 2: A pop-up note will be automatically opened by the new note to write text. When you’re done writing your comment, click on the “X” symbol present on the right side of the pop-up note.

how to add notes to a pdf in nitro

That's all the steps to add notes in PDF using Nitro. If you want to learn more other useful annotation tools to add notes, you can check these 10 PDF annotators to find a proper tool to enhance your work.

Part 2. How to Add Notes to a PDF on Mac

To add notes on PDF documents, we also have UPDF for Mac that easily annotates files on Mac. One can add or delete PDF texts as well as remove or attach pictures in PDF files. The Annotation tool of UPDF provides a delightful PDF reading experience to people, as it helps in highlighting important points and removes irrelevant texts.

add notes to pdf updf

In addition, you can view multiple PDFs in a tab. If you want to add some material to your PDF file, the sticky-notes option of UPDF assists in adding significant paragraphs to the document. There is a ‘Search and Find Text’ option that makes it stress-free to find any text in the file.

If you want to organize the file by rotating or deleting pages, you can also achieve that with UPDF. You need to follow the below steps to add notes to PDF on Mac with the help of UPDF:

Step 1: Import PDF File

The first step requires you to launch the UPDF application on your Mac. Now, click on the “Open File” option to open your relevant file in the application.

open file in updf

Step 2: Use Comment Tool

Now, you will see the "Comment" option; click on it. All the annotation tools of UPDF will appear on the main toolbar.

add comment updf

Step 3: Add Sticky Notes in PDF

Select the “Sticky Note” annotation tool and click on the place where you want to add the note. Now, you can simply add the text inside your sticky note.

add notes in pdf mac

Part 3. Video Guide on Adding Notes to PDF

Part 4. Method to Add Notes to PDF Online

PDF Bob is another efficient annotating tool that offers multiple features to edit the PDF document and make it understandable. With the assistance of PDF Bob, you can add texts wherever you want to in the document. Moreover, there is a highlighter, underline, and strikethrough tool that helps in pinpointing important texts.

The Shape tool assists in annotating the texts with circles, rectangles, arrows, and lines. You can easily edit your document with PDF Bob by adding images of PNG, SVG, JPG, and other formats in the PDF. If you want to learn how to add a sticky note to a PDF with PDF Bob, abide by the given steps below:

Step 1: Open the PDF Bob application and click on the “Start Editing PDF” option. Upload a PDF file that you want to annotate.

add sticky notes to pd

Step 2: Now, there will be an icon of “Sticky Note” on the left side of the panel. Click on it, and you can add comments by clicking where you want to embed the sticky note.

Step 3: After you are done adding the comments, tap on “Export” and save the modified file on your device.

add notes to pdf with pdfbob

Part 5. How to Add Notes to a PDF in Chrome

Google Drive is an online office suite that includes a spreadsheet program, a word processor, and a presentation tool. We can store drawings, pictures, videos, and documents. Any file that you will store in your Google Drive will automatically be available on your other devices as well. If you are interested in how to add a sticky note to a PDF using Chrome, follow the step guide below:

Step 1: Open your Google Drive on your Google Chrome. There will be a "New" button. Click on it and further tap on "File Upload."

upload file in google drive

Step 2: Select the PDF file from your PC and open it. There will be a “+” icon on top of the interface to add a comment. Click on it and highlight the area where you want to add a note.

add notes to a pdf in chrome

Step 3: Now, add your comment and press the "Comment" button. Your added note will appear on the document. After that, save the modified file on your PC by tapping on the “Export” icon.

add notes to pdf file


Sticky notes in PDF have great significance as they make it possible to highlight, underline, and remove certain texts from a PDF. If you need to add additional information to a file, sticky notes will be there to help you.

The article has introduced three PDF annotator, Nitro PDF Pro, UPDF, and PDF Bob, that assists in how to add notes to a PDF. We also guided you on how to use Chrome to add notes to your PDF. So, we now can quickly note any idea or information while reading any document.