Oh are you using the consumer dialog to edit profiles? That's more limited that the Pro grid dialog. If you want to use the full power of Pro you need to use the grid dialog.VRDPro V6. In the Edit Output Profile there are no tabs. In the video section of the GUI, there is no Chroma option. In the Advance section, under video encoding options, there is no Chroma option.
That should be set by default. Did you change it yourself?Found it. There is a VRDPro setting (#1) to use grid mode. This instruction needs to be added to the Application Notes web page.