Hey, I start using Skydemon this season.
Added an aircraft profile to my account - currently I fly C172M.
I entered the following to the W+B page:
Empty Weght: 682,00 kg
CoG lon: 1,00
CoG lat 0,00

Loading:
Fuel: 1,22
Pilot and Front Pax: 0,94
Rear Pax 1+2: 1,85
Baggage: 2,41
Baggage 2: 3,12


But now... I have no idea what to enter under "envelope".

According to the POH the following limits apply:
Forw. Limit
+ 0,980 m @ 1043 kp
+ 0,890 m  @ 885 kp or less
Aft Limit
1,201 m

This is the diagram...




Thanks for your help :-) :-)