From your xcf and the active layer. 
It is a big layer, the yellow dotted line is the layer boundary, so lots of transparency. Using the move tool, enable 'move the active layer.
   
Should go something like this: https://i.imgur.com/5qsghrm.mp4
	
	
	
It is a big layer, the yellow dotted line is the layer boundary, so lots of transparency. Using the move tool, enable 'move the active layer.
Should go something like this: https://i.imgur.com/5qsghrm.mp4

