Using SD with my own aircraft profile I have a question concerning the Fuel needed for a trip ...

According to the setting‌‌s in the profile for my aircraft, I see a number of lines in the fuel calculation:

"Rollen/Start" (Taxi and takeoff)
"Reiseff‌lug" (Cruise)
"Extra Zeit"
"Landung‌‌"
"Notfall" Emergency
Total

and ..
"Reserve"
Whi‌‌‌‌‌‌le all other lines have values according to my aircraft profile, "Reserve" is always reading 0,0!

This value also does not  change‌‌ if a change the fuel onboard to a different value.
I could not find a place in the aircraft profile neither in SD itself where I can change this value

Any help ?‌‌‌

For the aircraft in question i have the following Settings:
Taxi/Takeoff 5l
Landing   4l
Extra Time      45min
Emergency     10% (seems to be too small in comparsion to Extra time - should be changed  for my aircraft)
Fuel Consumption @ SeaLevel   50l/h
@ Max Cruise Level    34l/h

Here is a screenshot ....
‌It is the third line. All others seem to be according to aircraft profile
‌Maybe you can add lines
‌Fuel onboard / Safe Flight Time / Excess Fuel in ltrs and time
‌‌‌‌‌‌‌‌‌