Yes this is possible.
You can prevent the overtime calculation from being affected by creating a labor standard time when setting up modified labor on a monthly basis. This makes it possible to display the reference time as a guide.
Conditions of use
It is assumed that the settings are as follows.
Settings Other> Options> Attendance management settings> Variable Working Hours Setting Feature to Apply
Please display the following screen.
Settings " Employees "> Employment category settings > Target category [Edit]> "Working style" category> "Working hours": Select manual settings (flex and others)> [Transformed labor settings]
Check "Standard (hrs) settings per month" in the "Common" item, and enter the details in the standard time or the monthly base time in the " Monthly " item . After saving the settings with the [Register] button, recalculate attendance data and reflect it in the display.