Navigate to Reactions > Graphic Settings, there is a select which allows you to choose between three different behaviours:
- Exposed: all buttons are immediately visible on big screens, on small screens displays a hamburger toggle button;
- Reveal: only the most used reaction is visible, other icons are revealed on click;
- Static: all reactions are always visible on any screen size.
You may even set a different set of options if you need to offer a different experience to your mobile users, just click on the “Mobile” tab on top.