How to access HDMI ports on a LG Commercial TV with no input button

How to access HDMI Inputs via channel numbers for LG Commercial TV models: 32LV570H 40LV570H 43LV570H 49LV570H 55LV570H 65LV570H 32LV560H 40LV560H 43LV560H 49LV560H 55LV560H
TV Manual: https://www.lg.com/us/support-product/lg-49LV560H
Commercial Install Guide: https://www.lg.com/us/business/download/resources/BT00001837/BT00001837_3121.pdf

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