So correct me if I am wrong, but you want me to do this in the running animation itsself, right? Not the whole arms animation blueprint, or somewhere else? The reason I ask is because I did what you showed for the fwd running animation because it was unchecked, but it didn’t make any difference for some reason. I also restarted Unreal after to see if that may have caused it to take affect.
I tried looking into the FirstPerson_AnimBp just to see if this option was somewhere in it as well thinking maybe thats where I needed to do it, but I could not find the option anywhere in said blueprint, so I assume it isn’t what you were referring to.