To generate Patient ID card, go to Certificate > Generate Patient ID Card then select Patient and ID Card Template and then click on Search button. The list of Patients will be shown in the below of the page.

Now select patient for generate ID card and click on Generate button present at right side in the patient list, at click of this button patient ID card will be open.

Note: Do not print the ID card directly, here select the Destination (save as pdf) and save pdf file and then print ID card using this pdf file.