How to Get Developer Settings?
Press and hold the "Home" icon at the bottom left your home screen.
Then click on the "Modify Quick Experiments Settings" option on the screen that appears in front of you.
If you want to increase the size of your Story Bubbles, you should activate the "use large avatar in standard tray" and "use xlarge avatar in standard tray" options in the setting below.
After changing it like this, it looks like the following;
If you want to reduce the size of your Story Bubbles, you should disable the "use large avatar in standard tray" and "use xlarge avatar in standard tray" options in the setting below.
After changing it like this, it looks like the following;
