1. Specify page size. 2. Support system fonts. 3. Convert JPEG,TIFF to PDF. 4. Convert Text to PDF. 5. Supports tiff,jpeg,bmp,dib,emf,gif,icon,jbig,jp2,pcd,pcx,pict,png,pnm,psd,rle,tga,txt,wmf,xbm and xpm format. 6. 40,128-bit encryption. 7. Append to existing PDF file. 8.Add bookmarks. 9.Add PDF information. 10.Images can be from memory or disk. 11.Set viewer preferences. 12.Handle millions of pa