The OSP Spins program's user interface can be configured so as to reduce the number of options available to students. This allows teachers to write curricular material that forces students to interact with the simulation in a specific way. Some exercises are exploratory in nature, but some are targeted to a specific concept. A user interface that has all of the options available may be appropriate for exploratory exercises, but not for targeted ones. These configurations can be saved in xml files and then loaded as shown in this example.
Double-click the green arrow in the navigation page. The Spins Custom Interface node shows the OSP Spins program with an example of a which-way experiment with an interferometer (here the menu bar is not shown and only the relevant control buttons are displayed). The user can toggle between a "watching" and a "not watching" mode by clicking the purple button
or
which is currently displayed. Both ideal analyzers are black indicating that their orientation cannot be changed.