This article outlines how to toggle the VU Meter on/off within NDI Studio Monitor. This applies to the latest NDI Tools version 4.5 and above. https://www.ndi.tv/tools/
1) Launch Studio Monitor
2) Click the button at the top left (square with three lines in it) for the menu, OR right click anywhere within the Studio Monitor window for the same menu
3) Hover over "Settings", then "Video", and, lastly, click the "VU Meter" option to toggle the VU meter off/on.
Current as of 1/12/2021