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How to Markup and Annotate PDF

iSkysoft PDF Editor 6 Professional for Mac allows you to add text markups, freehand drawing, sticky notes, and more to PDF files.

1Add Text Markups to PDF

Highlight PDF Text: Open the PDF file with the program, and click on the "Comment" > "Hightlight". And select the texts in PDF file, the texts will be highlighted. And you are able to choose the highlight color and opacity.
Highlight PDF Text
Underline PDF Text: First open your PDF with the PDF editor, and click the "Underline" button under the "Comment" menu. And then select the texts in PDF, and you will underline the texts.
Underline PDF Text
Strikethrough PDF Text: You can click on the "Strikethrough" button under the "Comment" tab, and select the texts to strikethrough the texts in PDF.
Strikethrough PDF Text

2Add Sticky Note, Comments and Text Box to PDF

After you open the PDF file with the program, go to get the comment tools under the "Comment" menu.
Add Text Box: You can click on the "Text Box" button and input the texts to annotate the PDF. And you can click on the "Text Comment" or "Text Callout" to indicate specific information on the PDF file.
text box
Add Sticky Note: Click on "More" under the "Comment" tab, you can get options of "Sticky Note". The "Sticky Note" feature allows you to leave comments to PDF file.
sticky note
Add Text Comment: To add text comment to your PDF files you can choose the "Text Comment" from the "More" menu under the "Comment" tab.
text comment

3Add Freehand Drawing to PDF

You can annotate PDF by adding freehand drawing and shapes, including Arrow, Rectangle, Polygon, Line, Connected Lines, Oval, Squiggly Line, and more.
Draw basic shapes on PDF: Go to "Comment" > "Shapes", you can select the shapes including Rectangle, Circle, Arrow, and more from the right toolbar and draw the shape on your PDF page.
Add freehand drawing on PDF: To draw in a PDF document, you can open the "Comment" menu and select the "Pencil" option. Then you can draw free-form lines in the PDF file.
Draw in PDF

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