1.1. Manual Setup

1) Line up the perspective view roughly where you want the backdrop

2) Choose "View/Load Persp Backdrop" & pick a file

3) Click on the "Locate Tool" to edit the Backdrop - find this near the top of the tools panel, it uses the "Orbit Tool" icon at the moment.

4) This should give you access to move/scale and rotate the backdrop with manipulators.

5) The backdrop is normally only visible from it's own special Backdrop View. Switch to Four-View mode, then Hold the Left Button over the top right of a view (eg: Top View) where it says "3D Views". Pick "Backdrop"

6) I find it helpful to model in 2-View mode with "Overlay Backdrops" turned on, one view being Persp and the other Backdrop.

1.2. Lining up Multiple Views

1) Select "Locate" tool, and choose a Backdrop in the panel in the bottom left.

2) It is best to start with as close you can get to "Front" and "Left" oriented backdrops, although it will work with any angle.

3) The general idea is to place Targets in 3D and on the 2D images. Then you can manually or automatically align the images.

4) There are 4 kinds of targets accessed with the buttons near the top of the Targets Panel.

- Free: No Constraints

- Centre: Constrained to the Centre of the Front View

- Left: Mirrored to the Right when it moves (3D Left Target is copied to Right 3D Target)

- Right: Mirrored to the Leftwhen it moves (3D Right Target is copied to Left 3D Target)

5) To place a 3D target, choose the type from the Backdrops Panel then press F1 to F9 in a 3D view, then do the same in another view (several presses might be needed in multiple views to locate a point in 3D)

6) To place a 2D target, press 1-9 over the correct position on the Backdrop Image in a 3D view - only one press is needed to set a 2D Target.

7) If it goes wrong, and you lose sight of the image, press "Reset" to centre the current Backdrop back on the origin.

8) Press "Locate" to Triangulate the 2D Targets to the 3D Targets. Press several times till the backdrop stops moving.

9) Ctrl+NumberKey or Ctrl+FunctionKey = Remove a Target

10) Shift+FunctionKey = Refine 3D Target by position of 2D Target in multiple images.

11) Repeat from (5) to improve the position of your 3D targets to match the images.