You will be given the list of students for the selected Class Section
Students are marked "Present" on-screen by default when you open the Attendance for marking for a particular day, (PS Students are not marked present till saved) to ease teachers' operation, hence during the morning or Subject wise roll call teacher only have to mark those who are late or absent.
To Mark the Attendance from IOS (Apple devices) simply swipe from right to left on Students name, then tap on the Attendance type such as Late, Absent or Present.
To Mark the Attendance using Android Devices Tap & Hold on the student's name, then tap on the Attendance type such as Late, Absent or Present.
When done marking all students Tap on Save on top right corner.