If EthoVision XT displays incorrectly — such as large black areas or missing interface elements — the issue is typically related to GPU settings or outdated video drivers. This can occur in areas such as Arena Settings, Detection Settings, Acquisition, Track Editor, Manual Scoring, and Integrated Visualization.

Configure Windows to use the correct GPU for EthoVision XT:
C:\Program Files\Noldus\EthoVision XT XX\EthoVision.exeC:\Program Files (x86)\Noldus\EthoVision XT XX\EthoVision.exeNote: In some rare cases, using Power saving provides better compatibility. Try this if other options fail.

Make sure your monitor is plugged into the correct port. Many desktop computers have both onboard and dedicated graphics outputs.
Correct: Use ports located in the PCIe expansion slot area (lower back of the case) to ensure you’re using the dedicated graphics card.

To check if you're using a generic display driver:
To fix:
Contact Noldus Support if you need help determining the right driver or installing it.