The download books of this website can be viewed in Adobe Acrobat Reader DC – & PDF XCHANGE EDITOR. 

Adobe Acrobat Reader DC must be installed on the computer. It can be downloaded free from: https://get.adobe.com/uk/reader/ OR https://pdfxchange.eu/pdf-xchange-editor/). 

• The Table of Content (TOC) is linked with their appropriate pages in the       book, and the “Navigation Button” ( ترتیب  مضامین ) in the book pages is linked with TOC.
• Clicking any topic in TOC will take the reader to the selected topic in the book.
• Clicking the Navigation Button will return the reader to the TOC.
• The books that are without TOC are provided with “Bookmarks”.
• After the PDF book is opened in Adobe Acrobat, clicking the bookmark icon will open a side window showing the entire chapters and subchapters of the book. 
• Clicking the chapter will take the reader to the selected chapter.