Kestrel 101

Okay so i have watched most of his videos and i guess im still a bit confused on this video trajectory validation. When you zero your rifle are you capturing the environments in a different location in the kestrel? Do you have to zero your rifle everytime before you use it?
 
Okay so i have watched most of his videos and i guess im still a bit confused on this video trajectory validation. When you zero your rifle are you capturing the environments in a different location in the kestrel? Do you have to zero your rifle everytime before you use it?
No. But in the gun profile you record your zero conditions. Then when you go shoot somewhere else you use the current conditions and the ballistic engine makes the necessary corrections
 
See that would make sense but im not seeing any environmentals in gun management
Screenshot_20180701-083640.png