how to import reference image to blender?
You can open the Add context menu in the 3D viewport by pressing Shift + A.Choose Reference or Background by hovering over "Image."
The image will be added by Reference as a plane object to your scene, which can be edited just like any other object. Background is only visible from the view that it is attached to, such as the front, top, side, etc.
Don't forget to make the coodinate and rotation back to 0,0,0.
