Normally it is widely be used for graphics software such as Coreldraw, Illustrator, Freehand, Photoshop, PhotoImpact...etc. Convert all files to fomat of PDF, JPG or TIFF after finished your design lesson mistakes happened and it cannot be corrected or further ammended, however, most of them can be read without furtehr software tools support.

How to manipulate this graphics software and finally output files to PDF, TIFF or JPG, please contact your designer...