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