When I send messages a moment after it fades out how can I keep them?

[Shannon987]

Bonjour

Quand j'envoie des messages un moment après il s'efface comment je peux les garder ? Dans l'application message 

Hello

When I send messages a moment after it fades out how can I keep them? In the message application

-GT

[schetz]

Could you describe it a bit more ?

Where do they dissapear ? Aren't they all in messaging app ?