Added link for required software to download.

README.md

 
 ## Dependencies
 
-Please install libreoffice, imagemagick and might required ghostscript for Mac os
-**(Note: Please do restart after installed all required software.)**
+Please install `[libreoffice](https://www.libreoffice.org/)`, `[imagemagick](https://www.imagemagick.org/script/index.php)` and might required `[ghostscript](https://www.ghostscript.com/)` for Mac os
+**(Note: Please do restart your machine after installed all required software.)**
 
 ## Usage Example
 
   libreofficeBin: "C:\\Program Files\\LibreOffice\\program\\soffice.exe", // Optional
   sourceFile: "C:\\convert-pdf-img\\sample.pptx", // `.ppt,` `.pptx`, `.odp`, `.key` and `.pdf`
   outputDir: "C:\\convert-pdf-img\\sample",
-  img: true,
-  imgExt: "jpg", // Optional and Default image conversion format  is.png
-  reSize: 800, // Optional and Default Resize  is 1200
-  density: 120, // Optional and Default density value is 120
+  img: false,
+  imgExt: "jpg", // Default value png
+  reSize: 800, // Default Resize is 1200
+  density: 120, // Default density value is 120
 };
 
 // Convert document to pdf and/or image