# Viewport settings

This page of the application settings dialog contains options related to the interactive viewports of OVITO.

## Camera

Coordinate system orientation

  OVITO can restrict the viewport camera rotation such that the selected Cartesian coordinate axis always points upward. Default: z-axis.

Restrict camera rotation to keep the major axis pointing upward

  This option constrains the camera’s orientation to prevent the camera from turning upside down.

## Viewport background

This option changes between a dark (default) and a white viewport background.

## Viewport 3D graphics

Click on the “Configure…” button to open the real-time graphics configuration dialog, which is also accessible via the viewports context menu in the main window.