To mark a WhatsApp message as read on iPhone, swipe right over the conversation in the Chats tab and hit the Read button.On Android phone, touch and hold a WhatsApp conversation, then select Mark as read.On the WhatsApp desktop app for Mac or PC, right-click a conversation and choose Mark as read.To mark multiple WhatsApp messages as read on iPhone, tap the three-dotted menu in the top-left corner of the Chats screen and choose Read all.