How to rotate an image imported in to pcb editor as reference image

I am trying to do a reverse engineering of a single sided pcb. For that I placed a scanned image of a pcb. I always get the scanned image of the pcb tilted. So now my problem is to rotate the image with reference to bottom left corner in the steps of 1 degree so that I can get the right corner alligned with the outer edge drawn in EDGE CUTS layer. By alligning this all the connectors placed horizintally will also allign the componets brought from the library and placed exactly as per the image of the pcb. So how can I rotate the image very precisely. Please help me out. I am using kicad 9.99 nightly build version. I have started using kicad since last 15 days .

It’s better to manipulate the image in some image editor. KiCad isn’t good at many graphical things. Gimp, for example can fix many problems in photos (for those who use a camera instead of a flatbed scanner). But usually even the most basic image editors, including those coming with scanners, and also mobile phone camera applications, can rotate. More advanced can straighten by letting you to select the horizon.

Thanks, eelik. I will do it as you suggested.