Hi, I am new to Xlights and have set up my Layout with my house picture and adjusted the size to fit the screen. When I then went to Sequencer and House Preview the house picture was fine but at some stage I moved my mouse over the house preview and it changed. It has now squeezed the right hand side in to the left about half an inch with black which distorts the house shape. Top, bottom and left are fine. What did I click to alter it, or how do I get it back?