The video shows item interact UI system:

Item Interact UI system:

First, I created a user control, added a canvas panel, and placed a text box on the canvas panel with text prompting the player to press E to interact.

Next, add a widget to the item blueprint and adjust its position to the correct location.

Item Blueprint：

The design concepts behind these two items are the same.

The Blueprint is triggered when collision volumes overlap. I first added a player interface to the hit actor to ensure that this function is only triggered when a player enters the collision volume. The UI is displayed when the collision volume detects that a player has entered the area, and it is hidden when the player leaves the collision volume.

Remove collision：

During late-stage testing, when the door opened, players entering the UI’s collision volume would trigger it, causing confusion. So I added a feature that removes the UI’s collision volume once the door is open. This prevents it from being triggered again.