The identification and atom patterns used by the Constraint Table tool are the
same as that used by the Peak Identify tool. Because of this you can easily inspect
a row in the constraint table. Just highlight one row of the table and click the 
Info button at the top of the table. This will open both the
Peak Inspector and the Peak Identify tool for the peak that gives rise to the
selected constraint.
Clicking the button will display a spectrum window showing the appropriate region of the peak's originating dataset. The peak will be displayed and several lines will be drawn across the spectrum. A blue horizontal and vertical lines will be drawn at the chemical shift of the atoms involved in the current constraint. Narrower red lines will be drawn at the chemical shifts of the atoms for all the other active constraints that involve the current peak. The spectrum crosshairs will be positioned at the center of the current peak.
If you have the premium version of NMRViewJ with the crescent molecular viewer active then clicking the button will display the atoms as shown here. The backbone will be shown somewhat dimmed, the bonds in each of the two residues involved in the constraint will be displayed, and a green connector drawn between the two highlighted atoms.
