Hello Sunny, thank you for your questions and welcome to the forum! Let me try to answer: 1) If you want to change the installation type of a module array, just right click on it, select "Edit Array" and then change it to the desired value in this dialogue: 2) At the moment, we only support even surfaces in PV*SOL. They can have a slope, however. If you paint a polygon on the map import, and then select "Extrude 3D object", then select "Arbitray Open Surface" from the option