# Extended Right-Click Menu

The BS Contact right-click menu is exteded with menu options to control the simulation and operate the Curta.

To open the right-click menu: right click in the 3D display.

- The menu extensions are under a double horizontal seperator
- The first group is for special effects
- The second group is for operating the Curta
- Corresponding keystroke(s) are noted between the [] brackets

- the Fog menu is expanded once Fog is switched on
- Exponential Fog is only available when rendering is done via Open GL
- Fog Type and Visibility Range are only displayed

- the Clearing System menu is expanded once the clearing lever is extended
- Clearing Results and Turns Counter is only possible whith the lever extended