How to Change Font Size of Chats in WhatsApp on Android?br br Step 1: Open WhatsApp and login to your account.br br Step 3: Tap on 'chats,' and then tap on 'Three Dots' at the top right.br br Step 4: Tap on 'Settings,' and then tap on 'chats.'br br Step 5: Tap on 'Font Size.'br br Step 6: From the pop up, tap on size that you want like small, medium or Large.