Modules aligment
Sometimes aerial images are not perfectly perpendicular, which can result in the polygons not being perfect when you draw your installation on the image and you find that the modules do not line up perfectly with those of the roof ridge.
The key is to choose the reference segment and orientation correctly.
Select the drawn roof and check which segment is the reference segment (green segment).
Choose as reference segment the one that represents the top of the roof, in this case 4.
In the right menu select Surface --> Orientation --> Upper segment to apply the tilt considering this segment as the highest one.
You will now have your modules aligned with the top of the roof. 🎉
INFO
The tool automatically selects the first segment you draw as the reference segment. It is therefore advisable to start the drawing at the ridge of the building.