SKU: All UHD Series
Subject: How to Toggle Between 4KSDR and 4KHDR on Yamaha AVR
Steps:
1) Turn the receiver off.
2) While holding the Straight button 
on the front of the receiver, press the power button, then release the Straight button.
3) Press the Program left arrow button until the receiver brings up "4k Mode", then press the Straight button to toggle it to Mode 1 for 4KHDR and Mode 2 for 4KSDR.
4) Power off the receiver.
5) Disconnect the HDMI Inputs at the receiver from the source devices.
6) Power on the receiver.
7) Reconnect the HDMI Inputs at the receiver from the source devices.
Now your sources should pass through the video mode you selected.
Article ID: KB01485