Currently to support you in recording non attendance in accordance to the DfE Guidance there are only Subcodes for I and X codes.
Adding further Subcodes for your own recording of attendance can be done using the Add New Record at the bottom of the Manage Attendance Page.
When you click Add New Record a blank box appears.
In the first box you need to add a three digit code, this must start with the original attendance code that you are adding a Subcode to. The second box is where your description is added.
Please use the Tick at the end to save the new code.