I picked up an HDMI 5" External Monitor today - and everyhting seems to be working as expected, however, I can not figure out how to get Peaking & Zebra's to show on the external.

They show on the LCD and the EVF - but not the external?

Ideas?

In my experience, they don't. If HDMI is like SDI, those are functions in the monitor. My Marshall does Peaking, 1:1, invert and False colors to name a few. THese are independent of the LCD.