How do I change the font size?

Click the Settings gear icon in the top right corner, and adjust to the preferred size.

How do I change the order of the comments?

Click the Settings gear icon in the top right corner, and select the preferred order.

How do I turn off sounds made by the app?

Click the Settings gear icon in the top right corner, and tap Turn off sounds.

How do I change my display name?

This feature is under construction and it will soon be available in Settings.