Invoking the Vincennes graph interface, how to select other base modes

I need to call the Vincennes graph interface, select the type as flux, and the default loading is sd, but I do not know how to change the type of the bottom mode through parameters. How is this controlled? Please answer, thank you very much

The issue names the Vincennes graph interface and the flux and sd modes but gives no file, test, or entry point. Trace the interface's parameter handling to identify how the bottom mode is selected, then document the parameter and verify that it changes the loaded mode.

Written by the indexing model from the issue text.