Because for the new users this software is very simple to operate. The interface of the Photoshop CS5 portable is so simple which is the reason for the popularity of this software. You can make the album of your photos in one pic or you can make the slideshow of your picture in this software. If there is the unwanted portion which you want to remove then you can easily crop that portion in this software. You can crop, blur and add many more effect to your images by using this software.
Because there are the most advanced features added in this software which was not in the previous software. Adobe Photoshop CS5 Portable is the software which people get in their system as a first choice to edit their pictures.