Please don't ask how to mod mobile Terraria. It is against 505 Games' policy, and as such, we do not permit the discussions of how to do it on the forums.
Hi
@rob151515, and welcome to the forums. I know that you were just trying to be helpful explaining how to get a phone to show ten hot bar slots, but discussions of how to mod mobile Terraria are not permitted on the forum. You can, of course, do whatever you'd like with your own device, but please do not share methods here on the forums. Thanks.
Here is more info:
Official 505Games Policy Regarding Console/Mobile Hacking