The UI Manager contains the entire user interface for all game modes. To open it press the (Tools -> USK -> Project Settings -> UI Manager)or use the Shift+U hotkey.
All UI elements are divided into groups to make it easier for you to interact with them.
When you open a section, the entire UI of that group is activated.
Please note: don't delete or move the path items that are written in caps (for example, CHARACTER UI / GAME UI), but you can safely move and delete everything else.
During the game, when UI elements appear on the screen, then the corresponding menu opens in the UI Manager prefab (which is located in your game scene).