📋 Newlines in Messaging apps

How to consistently make a newline inside a message, in the different messaging apps?

	🟢 Alt+Enter = 83%	🟡 Shift+Enter = 67%	🔴 Fn+Enter = 33%
Adium	✅	❌	✅
Facebook Comments	✅	✅	✅
Facebook Messages	❌	✅	❌
iMessage	✅	❌	❌
Skype	✅	✅	❌
Slack	✅	✅	❌