There are two ways to print lexical items. The first is to simply select the items that you want to print from the lexical item list and then select Print under the File menu. Alternatively, you can select one or more themes from the theme list. This time when you look under the File menu you'll see the option Print by Theme. This will print all lexical items within the selected themes. The format of the printout is the same as if you were printing items normally except that lexical items are printed in groups with the theme name is printed above each group.
With both types of printouts, the data actually printed for each item depends in what printout preferences are set. Printout preferences are found in the Preferences dialog.