Configuring quick emoji reactions lets you access your most frequently used emojis by hovering over a message.

How to configure quick emoji suggestions? 

• Click your profile image in the top-right corner and select Profile & Settings.

• Select Quick Emojis to update your quick emojis.

• Alternatively, click Settings → Configure Sidebar → Quick Emojis to update your quick emojis.

• The updated Quick Emojis will now be suggested when you react to a message.