If you're duplicating data CDs, simply use the verify burned img. button, as seen in Figure 18-7 . It's quite self-explanatory. If you've instead mastered your own CD (either with X-CD-Roast or from the command line), you can just use that option as well ”or you can run the verify burned img. option from the Master CD button, as seen in Figure 18-4 . Select the proper image file, and verify away.