Rotation of background images

Hi Pyrosim developers.

I have been a Pyrosim user for some time. When I input an image as a background image, the software automatically use the anchor point as the original point of the coordinate system and screes horizontal direction as the x-direction. If I have an area in a building that is rectagular but none of the wall is horizontal, it will create step-shape walls which I do not like. To solve the problem, I had to use an image editor to rotate the floor plan so that the rectangular sides parallel to the x- and y- coordinates. I wonder, is it difficult to add one function (preferably as an option) in the image input window to allow the user to define the x-direction? Then Pyrosim automatically rotate the background image. This can make the software more flexible.