Academic Settings / Attendance Settings / Attendance Taking / Attendance for Subjects / If the Student has a Subject status of Attendance Semi-Exempt (marked Orange) then the default Absence Category is
Here, you can set the default absence category for students exempted from certain subjects.
You can set a different absence category or use the functionality based on your own needs.
Example
Setting -> Not known reason
Bart Franck is in orange because he is semi-exempted from Spanish. (Figures 1&2)
Figure 1
Figure 2
Tip: To configure absence categories, navigate to Academic Settings / Attendance Settings / Dropdown lists / Attendance Categories as shown in Figure 3.
Figure 3
Tip: To configure subject categories and set attendance exclusion, navigate to Main Settings/ Dropdown lists / Type-Students / Dropdown lists-Subject Status, as shown in Figures 4 & 5.
Figure 4
Figure 5