Ok you mean how to change the radius at runtime? Not the default in your Blueprint’s Details panel?
I know how to do this in code, but not sure if the right Nodes are exposed by default in BP…
If you’re interested, the code I’ve used is:
const FAISenseID SenseIdFilter = UAISense::GetSenseID(UAISense_Sight::StaticClass());
UAISenseConfig_Sight* SightConfiguration = Cast<UAISenseConfig_Sight>(MyAIController->GetAIPerceptionComponent()->GetSenseConfig(SenseIdFilter));
if(SightConfiguration)
{
SightConfiguration->SightRadius = ....
}