I'm not a payroll export, but from Help of working times form
Control - To edit details in the lower grid for the
selected date, select Open.
This field is not used to determine
whether earnings will be generated for a
specific date. Earnings are generated for
the hours in the lower grid, as long as the
value in the Efficiency in percentage
field on the line is not zero.
Earning code - A green icon in this column indicates that
an earning code for this date is already
added to the lower grid.
Typically, earning codes are assigned to
the worker's position assignment. When
earnings are generated, the default
earning code for the position is used.
If an overriding earning code is required
for a day, you can enter it in the calendar.
For example, you can assign a holiday
earning code for the paid holidays that
the company recognizes. The earning
codes that are entered in the lower grid
are used when earnings are generated for
the selected date from a schedule that is
based on this calendar.