To generate an ID card, go to Certificate > Generate ID Card then select Class, Section, and ID Card and then click on the Search button. The list of Students will be shown below on the page.
Now select student to generate ID card and click on Generate button present on the right side in the student list, at the click of this button students ID card will be open.
Note: Do not print the ID card directly, here select the Destination (save as pdf) and save the pdf file and then print the ID card using this pdf file.