I am trying some fine tuning match between an 3D object and a photo that I put in background with watermark.
But when I move on the trackpad, or touch the wheel of the mouse, even if I dont want to do it, the zoom change on the screen and ruin my efforts.
The zoom si also different when I load a saved work.
The actual size of the object has not changed.
How can I prevent this ?
How can I lock the zoom value ?