This mode is similar to the blueprint mode. It uses an image in the background and white shadows but uses much larger oversized widths to simulate more of a sketch mode. Download and extract the Blackboard + Background file for the settings.
To use the downloaded advanced display mode please open Rhino go to Tools > Options > View > Display Modes and import the .ini file.
Then, on Tools > Options > View > Display Modes > Blackboard: Display Mode Options > Viewport Settings > Background, click the "..." and look for the blackboard background image file downloaded.