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 ?‌‌‌

I will ask our translator if there is a better phrase we could use.

If you have a suggestion for a change in the way the product works‌, it would be best to post it in the Suggestions forum. I believe your question here was what the purpose of a specific item in fuel planning is, which has been answered.‌

Thank you for your answer.
I have been thinking of what the best german Translation for "alternate" can be: the german term is "Ausweichflugplatz". But "Fuel to alternate" sounds much better and everybody understands it, I suppose.

Concerning my suggestion about improving the fuel calculation Panel I already reached the most competent Person for this Suggestion - no Need to post somewhere else. I don't‌‌‌ Need education about where and how to post.