I get this, add a moviescene(double/bool/string)track ,(i test moviescenedoubletrack) -----add cast to moviescenepropertytrack -----set propertypath and name,note path and name 。maybe they are defferent， name is your blueprint（actor） ---- detail panel ------variable character, path is your blueprint ------my blueprint panel----variables variable character 。 and then moviescenepropertytrack reference----- add section—get all channels---- cast to moviescenescriptingdoublechannel---- add key—set time 。
this way you can automatic key anim ，