To get at the general settings for Signal, from the Chats tab tap the three dots (top right) then Settings on Android, or tap your profile picture (top left) and then Settings on iOS. You can change a number of options from here: Choose Appearance, for example, and you’re able to change the app theme, colors, and icon.

Downloads of the app surged in the past week after the Atlantic published White House officials’ texts about a military strike.

Top Trump officials are facing a firestorm after using the commercially available app Signal to discuss a U.S. military attack on Houthi rebels in Yemen.