How to set the traditional key position of dota2

There is a choice of the first generation key in the settings, but the second generation key is actually very easy to use. The remaining keys can control the item bar. Some heroes will use the generation key to occupy the item bar key. If they are not used to it, it is not a problem. I get used to playing a dozen keys. I'm just not used to it before, but now I think the second-generation key is really unreasonable.