Hi @knutov,
Thanks for your question,
At the moment there isn’t a way to do this. To streamline your display, you could change your display setting to “compact view” via “Account Settings” > “Display” > “Message Display”.
If you’d like to suggest this as a feature in Mattermost, perhaps you’d like to create a suggestion on our Feature Forum. Here, you and others can up-vote the idea up to 10 times.