Speed Tab

Use this tab to adjust the frame rate speed to reduce the amount of drop-out during navigation.

Tip: If this does not improve navigation, try switching off the Guarantee Frame Rate option.
Frame Rate

Specifies the number of frames per second (FPS) that are rendered in the Scene View.

The default setting is 6. You can set the frame rate from 1 through 60 frames per second. Reducing the value reduces drop-out, but can cause jerky movement during navigation. Increasing the value ensures a smoother navigation, but increases drop-out.

Tip: If you want to restore the default values, click the Defaults button.