When the Always Connect HQ option is enabled, all sources are output in High Quality. If this option is not selected, sources are proxy quality. The Always Connect HQ option can be configured from the global settings for all sources, as well as individually for each source.
The system automatically adjusts the NDI input to either HQ or Proxy according the preview size. Proxy stream is used by default.
\uD83D\uDCD8 Always connect HQ settings:
...