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How to Add Notes to a PDF Effortless

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 10/11/8/7

UPDF is a robust 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. Enter the Commenting Mode

Now you can tap on the "Comment" icon on the left. By clicking the "Comment" icon, you will see multiple annotation tools, including highlight, strikethrough, underline, typewriter, text box, sticky note, and shapes.

enter into comment mode

Step 3. Add Notes to PDF

To add a note to the PDF, click the "Sticky Note" icon and click anywhere on your document to put the sticky note. After that, you can enter the reviews in the pop-up window.

add notes to pdf

That's all the steps to add notes in PDF using UPDF. 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.

The best part about the Mac version is that you can click the "Desktop" or the "Download" option to open the path quickly and directly.

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. You will notice that there are more annotation tools in the Mac version, which include sticky notes, highlight, strikethrough, underline, squirrely line, typewriter, text box, text callout, pencil, eraser, shapes, stickers, and signatures. Amazing, right? UPDF has the most annotation tools than any other competitors.

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

Video Tutorial on Adding Notes to PDF on Mac

Video Tutorial on Adding Notes to PDF on Windows


Sticky notes in PDFs 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 the best PDF annotator, UPDF, that assists in how to add notes to a PDF. So, we now can quickly note any idea or information while reading any document. Download and use it now!