Displaying and hiding a sheet of UMG elements in-game

We have already discussed how to add a widget to the viewport, which means that it will be rendered on the player's screen.

However, what if we want to have UI elements that are toggled based on other factors, such as proximity to certain Actors, or a player holding a key down, or if we want a UI that disappears after a specified time?

How to do it...

1. Create a new GameModeBase class called ToggleHUDGameMode:

2. Add the following UPROPERTY and function definitions to the ToggleHUDGameMode.h file:

#pragma once

#include "CoreMinimal.h"
#include "GameFramework/GameModeBase.h"
#include "SlateBasics.h"
#include "ToggleHUDGameMode.generated...