How do I get ride of the Cage?

When using the Vive there is a cage marking the space I can move in. While being close to a wall, I want the player to see what is on the wall without being irritated by that cage. In my experience, people don´t like to move through Objects anyways, so there should not be any risk of them colliding with real objects if scripted correctly.
I am new to the Vive so here are my Questions:
How can I access the cage to activate and deactivate it with an overlap event on just one side? (If I am correct, the name of the cage is “Steam VRChaperone”.)
Is the cage part of UE4 or part of the Vive software?

Chaperone is part of the Vive / SteamVR software, you can’t change it for users through BluePrint.

If you want to change it for yourself, you can put on the headset and go into the SteamVR settings to change Chaperone.

Thanks a lot for this information. Can I potentially access that over C++? It would be rather important for my project.