Print Wizard version 3.0 introduced the concept of Smart Print. With "smart print" turned on, virtually any print file that resides on your PC and has a related file association can be printed.
Print Wizard supports several types of files by their file extension, from text files with a .txt to graphics files with a .JPG extension. However some files only print properly through the applications that support them, such as a .DOC file. With "smart print" on, Print Wizard will try to determine, from the file extension, how best to print a file.
If "smart print" is turned off, Print Wizard itself will try to always print the file it is given.