iSkysoft PDF Editor takes the security of your PDF documents extremely seriously.You can highlight the text using the “Text Highlight” and “Area Highlight” button.There is also a descent set of markup drawing tools prepared for the users including squares, circles, etc.The “Comment” feature allows you to make a place into which you can insert your text comments and sticky note.Employing the fabulous interface of iSky-soft PDF Editor you can insert important comments, highlight major lines, and draw shapes and lines which make your page more descriptive.