@jonny round boy said:

[cut]

I'm using the PLE version of ARmedia, and SketchUp7 for Windows. The included target is 80mm square, but when I load a model & import the target into SketchUp the virtual target is 2032mm, ie 80 inches (unit preferences in SketchUp are set to mm). This means that any model I want to view at actual size, I have to scale up by a factor of 25.4 (25.4mm = 1 inch).

I don't know if this is an issue with just me, or if it's the same for everyone. Is there a way for the virtual target to be reduced in size? I tried scaling it in SketchUp but it just defaulted to the bigger size.

If you check the 'Fit Scene' box in the AR-media Configuration Utility, during the AR visualization all your scene will be automatically scaled to be contained within the virtual marker's boundaries.
To access the Configuration utility, you can click on the second button from the bottom of the toolbar or click the 'Configure...' button in the menu/main window.

Hope this can help you resolve this issue.