To generate certificate, go to Certificate > Generate Certificate then select Class, Section and Certificate and then click on Search button. The list of student will be shown in the below of the page.

Generate certificate image

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

view generate certificate image

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