how to put canvas in front of 3d gameobjects

Hi, i have this scene in which with the rotate slider i rotate the game object that has all the gameobjects shown below as children.

Each gameobject can be dragged and dropped to complete the 3d puzzle. Anyway, my problem is that when the slider is on top of a game object and all i want to do is rotate all the object, the item below the mouse is dragged with it. Can i somehow put the canvas in front of the gameobjects so that when i handle the canvas the gameobjects dont interract with the mouse?

Thanks in advance

Are you simply trying to stop clicks propagating through UI elements?

http://youtube.com/watch?v=EVZiv7DLU6E

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yes, that’s exactly what i was trying to do. Thanks a lot