PDF or Portable Document Format is extremely popular today and this is for many reasons. For one, when it comes to reviewing, altering or editing PDF files, it is a lot easy for users to work together with others. Besides that, PDF offers security for files published on websites or shared with others. One of the most popular activities performed when using PDF files would be to annotate or highlight text or content. Even if you are not using this feature, you should learn how to annotate PDF text.

Part 1: How to Annotate PDF on Mac

Mac OSX offers a function that is built-in to the computers for all basic annotations but it does not offer everything needed for more than the basics, which is an inconvenience for some. However, there is a PDF editor created by iSkysoft that offers all regular annotation tools to add annotations and edit PDF documents. iSkysoft PDF Editor for Mac (PDF annotator for Mac) will mark and annotate any PDF easily. It includes Text Box, a free-hand drawing tool, sticky notes, multiple line-drawing tools, markup tools and so on. There is also a dropdown menu that includes all of the tools in the Tools menu. You can customize the tool bar to add your favorite annotating tools.

annotate pdf on mac 

How to Annotate PDF on Mac using PDF Annotator Mac

Step 1: Annotating Text Using Text Boxes and Sticky Notes. Simply select the sticky notes and text boxes that you want to use and drag it to anywhere on PDF file. You can then just type the information that you want to add. The color for both can be changed.

Step 2: Make Annotations Using Drawing Lines. It is possible to draw line and add imprints onto the pages. To do so, go to the Annotate tab and click the arrow icon. Then you can select any drawing to add to anywhere on your PDF file.

Step 3: Free-hand Drawing and Adding Hyperlinks. The toolbar has a pencil button, which is perfect for drawing on the PDF pages. If you make a mistake then the eraser tool can be used to change it. It is also possible to add links (URLs) in pages.

Step 4: Markup the Document. If you want to highlight specific text, the markup tool is perfect for this. You can change the color of the highlighter. This tool also allows you to cross out information or underline important sections. This is perfect for marking content.

See the Detailed Video Tutorial

You could also highlight PDF content to make it easier for everyone in cases when more than reviewers are working on a document. A good PDF annotator for Mac will offer ease of use, convenience and advanced features. So, you can add comments on a PDF file.

Part 2: How to Annotate PDF on Windows

edit pdf windows

To annotate PDF on Windows, you can use iSkysoft Windows PDF Editor. This Windows PDF annotator will provide a flexible platform for you to annotate PDF files as well as edit, encrypt, convert, markup and do more in fast and easy steps. You will find that the PDF annotation software is fairly easy to use as it will only take a few clicks for you to add or insert comments.

  • Step 1. Launch this Windows PDF annotator and click Open to import PDF file.
  • Step 2. Go to Comment tab and select the annotation tools to annotate PDF.
  • Step 3. Click Save to save your annotation.

Part 3: Free PDF Annotator for Android, iPhone, iPad or iPod

PDF has become a widely used file format. You can read PDF in many platforms like Mac, Windows, or even your iPhone, Android devices, etc. Here we are going to focus on free PDF annotator tools for you to annotate PDF on Mac, iPhone, or Android devices.

1. PDF Annotator for Android

iAnnotate PDF

• iAnnotate PDF

iAnnotate PDF is a free PDF annotator for Android users to read and annotate PDF. iAnnotate PDF lets you annotate , search, manage and share PDF documents easily on any of your Android tablet. iAnnotate PDF could be the best PDF annotator app to annotate PDF, sign contracts, take notes on lecture slides and more.

How to Use iAnnotate PDF: After opening your PDF file with this PDF annotator Android tool, go to the annotate interface. Then you will see multiple annotation tools on the right side. Click on any tool to highlight, underline, and add texts to your PDF file.

Download iAnnotate PDF >>

PDF Annotation

• PDF Annotation

PDF Annotation is another PDF annotator freeware. With a long press on any of your PDF texts, you are able to annotate the file easily. It provides actions like edit, delete, move or resize texts on a PDF file. What’s more, you can get annotation report to locate the annotation you have left on specified page.

How to Use PDF Annotation: When you have opened your PDF file with this free PDF annotator, long press anywhere on the PDF file to add the annotation. Go to annotation list, you are able to view the annotation report.

Download PDF Annotation >>

2. PDF Annotator for iPhone, iPad or iPod

Adobe Reader

• Adobe Reader

Adobe Reader mobile app for iPhone, iPad or iPod is available in iTunes Store, which is designed as a free PDF annotator for Apple mobile users to view or edit PDF directly on their iPhone, iPod or iPad. You can quickly open PDF files on your iDevice from Email or webpage and read the PDF with built-in PDF viewing tools. And it provides many useful annotation tools and drawing markup tools.

How to Use Adobe Reader: After you get this PDF annotator free download on your iPhone or iPad, open a PDF file. Then you can highlight, underline or strikethrough any texts. Or you can add freehand drawing and comments to any position of the PDF.

Download Adobe Reader >>

PDF Review Free

• PDF Review Free

PDF Review Free is a free PDF annotation software for iPhone (iPhone 5), iPod and iPod touch. The easy-to-use interface allows you to quickly ass feedback to PDF files. The feedback has different types like issues, questions and notes. And it allows you to easily navigate to the feedback you have left on any position of your PDF file. It will send you a structured review report including the annotated and feedback pages.

How to Use PDF Review Free: Import a PDF file to PDF Review Free and open the file with this application. Then find the page you want to annotate or left feedback. Tap on a sentence or a paragraph to select the texts and you will get a pop-up window to work with feedback.

Download PDF Review Free >>


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Balkhi
Well explained, Annotating text using Text Boxes and Sticky Notes is really cool option in this software. and their is some other best options which we can\'t find in other program.
Amanda T.
Great post Ivan. How to annotate PDF on Mac OS X seems pretty easy to do. I would think that I could do it. The software seems like it would be a nice one to test out, so I believe that is what I will be doing this weekend. Looking forward to it.
solicor
This is the great mac pdf annotation software for me to annotate PDF on Mac OS X, good recommendation.

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