You can talk with the friend you are playing against by using the game's Chat feature. To activate Chat, please follow these steps:
 
1. Tap on your ‘Profile’.

2. Tap the ‘Settings’ tab.

3. Toggle the Chat notifications on.

 

While playing, you can access Chat without leaving the board. Here's how:
 
Tap the Chat icon in the upper right-hand corner of the board.

 

You can also enable and disable the chat feature by following these steps:

1. Tap on your ‘Profile’.

2. Tap the ‘Settings’ tab.

3. Tap the ‘Global Chat Settings’

4. Toggle the button to enable/disable the Chat feature.