To add an exam subject, go to Examination > Exam Group then click on Add icon present at Action column in the exam group list, at the click of this icon Exam List page will be open.
Now click on the Exam Subject icon present in the Action column on the exam list page, at the click of this icon Add Subjects modal will be open.
Here click on the Add Exam Subject button present on the right side of the additional subject page, at the click of this button new column box will be added then fill in the details Subject, Date, Time, Duration, Credit Hours (If you are using GPA grading system exam type, then enter the credit hour otherwise ignore it.), Room No., Marks (Max) and marks (Min.) and then click on the Save button. If you want to delete any subject then click on the Remove icon.