Call_me_jorge said: "the current tour of phantom, he is standing and not in a chair. How is that done? I was think a trapdoor, but it's a tour so I doubt it's that."
The cloak he puts on has a support structure in the hood and shoulders, and is never fully attached to him. It just sits on his shoulders. When he faces upstage, standing near the bed, and Meg grabs his shoulders, he simply steps or crouches out of it while she holds it in place, and I think he actually hides under the bed, through a trap door in the part of the frame that the audience can see. It's hard to tell, but it's very dark by the bed, and he stands directly in front of it before he vanishes. His movements are covered up by how wide the cloak is. Meg waits for a signal from one of the actors upstage of the cloak, and then drops it.
As a disclaimer, I've never been told how it works, but I've seen it from a few angles and as best I can tell, that's what happens, if no trap door is involved.