How to : Gunsight adjustment?

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I should have figured this out long ago but never gave it much thought. I think I know where in settings to find where to adjust settings but not how to ( I always thought these settings were for Tank Crew) So what the best way to lock in range settings for aircraft gunsigts.What should I be looking at to change from Default settings? Do I need to do it in plane for each plane I fly or can I do one setting for all? Will settings remain after I set them or do they need to be changes with each reboot of game? Maybe there is a readme on the subject I can "aim" for???

[Apanos9]

 

 

You can find more at the channel!

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Ahhhhhhhhhhhhhhhh!