You can set up a perspective on a viewpoint using an image so
that both match, allowing you to see 3D objects as if they were positioned within the
image.
From the Images section of the action bar,
click Camera Matching.
Select an image.
Vanishing points and vanishing lines appear on the image. One vanishing point
and two vanishing lines are available for each plane.
Move the points or the lines on the image.
You can activate or deactivate the viewpoint using the context menu.
The camera adapts to the image and the image fills the camera frame.
Note:
You cannot rotate the image while
manipulating.