Arma 3: Mission Presentation
In order to play a scenario from the main menu, player has to go through multiple menus. While in the scenario itself, additional user interface elements are available.
Scenario designers are advised to configure all of them correctly in order to make their scenarios consistent and comfortable for players. It is important to realize your scenario doesn't start when player takes controls, but is presented already in main menu, during loading or when reading the briefing. Every impression counts!