How to Markup a PDF Document on Mac and Windows

"Why I cannot mark up texts on PDF with Adobe Acrobat?"
"I need to mark up a PDf file. Is there any best PDF markup tool available?"
Many of us encount such cases when we need to markup, annotate or comment on PDF documents. No worry! Here are some useful tips on how to markup a PDF file on Mac or Windows easily and quickly.

• Part 1: How to Markup a PDF Document on Mac
• Part 2: How to Markup a PDF Document on Windows
• Part 3: Top 5 PDF Markup Tool for Mac and Windows
• Part 4: How to Choose the Best PDF Markup Software

Part 1: How to Markup PDF Document and Add Comments to PDF on Mac (Including macOS 10.13 High Sierra)

Marking up a PDF on Mac is relativity simple with the correct tools. Here we would like to introduce you to an easy-to-use yet professional iSkysoft PDF Editor 6 Professional for Mac  tool, which can easily help you markup a PDF in your Apple Mac operating system. Below is the detailed information about how to annotate a PDF document by using iSkysoft PDF markup program.

Steps for PDF Markup and Adding Comments to PDF on Mac (macOS High Sierra)

Step 1. Import PDF File to the Program

After launch this Mac PDF markup tool, click on the "Open File" button to import your PDF file to the program. To annotate your document, you can use this PDF annotator tools to highlight the text you wish to mark up.

Step 2. Highlight PDF

There are a number of PDF markup tools that you can choose from the "Comment" tab. It contains highlight, underline, strikethrough and radio buttons to add notes to your text that you have highlighted. You can click on the "Highlight" button and select any texts in PDF to highlight the texts.

Step 3. Add Sticky Notes or Text Boxes

You can also add a "Sticky Note" for yourself or the reader to understand what you have done and why. Click on the "More" button and select the "Sticky Note" option to add notes to your PDF.

Step 4. Add Freehand Drawing to PDF

Drawing markup is a great way to direct the reader to the area that you have marked up without cluttering your paper. The drawing tools allow you to draw Arrow, Rectangle, Polygon, Line, Connected Lines, Oval, Squiggly Line, and more direct to text, along with different shapes that you can add to the markup. It also allow you to add freehand drawing. When you want use these drawing tools, you can click on the "Shapes" button under the "Comment" tap.

Part 2: How to Markup PDF Document on Windows (Including Windows 10)

If you need to mark up PDF documents on your Windows PC, the iSkysoft PDF Editor 6 for Windows version can do it well. This Windows PDF markup tool comes with various useful annotation tools including Highlight, Underline, Strikethrough and Sticky note, etc. Also it can do freehand drawing and let you make the note box in different shape. Let's see how it works:

1. For adding sticky note, go to the "Comment" tab and click the "Note" button. Next, click the PDF text where you want to add note, a pop-up text box will appear. Now you can input notes or comments to the text box.
2. For highlighting PDF text, click on the "Highlight" and select any part of PDF text to highlight this part. If needed, you can use the same method for underlining or strikethrough.
3. For drawing markups, go to the "Drawing Markups" section, you will see several drawing markup options like Line, Arrow, Cloud, etc. (or you can use the "Pencil" tool to draw a shape you like). Click one of the option and click anywhere in the PDF file, then move the mouse to start drawing. After that, click the drawing, you will get pop-up text box. Now type your text in the box.

Part 3: Top 5 Other PDF Markup Tool for Mac and Windows

1. Preview

Preview is a free PDF markup tool for Mac users. It not only allows you to view PDF documents on Mac, but also provides you with basic editing tools to add notes, highlight or copy texts in a PDF file.

Support OS: Mac

Price: Free

Download Preview >>

2. Skim

Skim is a software for PDF markup on Mac OS X. It helps you to read and take notes in PDF. You can add or edit notes and highlight important texts in a PDF. If your file is saved in wrong extension, Skim can also open it correctly.

Support OS: Mac

Price: Free

Download Skim >>

3.Foxit Reader

Foxit Reader is a Windows PDF markup tool. You can use Foxit Reader to view PDF and add comments to PDF files. And even secure text, add multimedia levels and run JavaScript for PDF files.

Support OS: Windows

Price: Free, Pro $129

Download Preview >>

4. DF-XChange

PDF-XChange is another PDF markup software for Windows. It lets you view PDF easily and provides you with features including PDF markup, text extraction, pages and images exporting, and more.

Support OS: Windows

Price: Free, Pro $34.5

Download PDF-XChange >>

5. Adobe Acrobat

Adobe Acrobat reader is a free PDF viewing tool for Mac and Windows that integrating with commenting function. But if you want features of edting , creating and more, you have to upgrade to the paid version ($299).

Support OS: Mac/Windows

Price: Free, Pro $229

Part 4: Choose the Right PDF Markup Tool that is Best for You

Choose the Right PDF Markup Tool to Mark up PDF Easily	Preview (Free)	Skim (Free)	Foxit Reader (Free, Pro $129)	PDF-XChange (Free, Pro $34.5)	Adobe Acrobat (Free, Pro $229)	iSkysoft PDF Editor 6 Professional (Free, Pro $99.95) DownloadDownload
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Add Comments and Notes
Create PDF from Webpages, images, text files	---	---	---	---	---
Insert, delete, rotate or crop PDF pages	---	---	---		---
Convert PDF to Word format	---	---	---	---	---
Combine, split or compress PDF	---	---	---	---	---