I don't own a Phaseone myself but my friend is owns one and since he does not use the camera this way he did not know how to do it and he is nice enough to allow me to use it occasionally.
I'm shooting a lot of tabletop and using flash and I need to use Liveview for correct focus.
When I'm shooting I need to open up the aperture and iso to get a image I can see to focus. Both Canon and Fuji has a setting where I can turn off/on the exposure preview in the live view but I can't find it on the Phaseone.
Surely there must be one and I'm just stupid and can't find it, this is the tabletop camera no1 so there has to be one.
I usually shoot tethered but it would be interesting to find out how to change this both in tethered mode and live view on the back of the data back.
Its a IQ4 back with a XF camera.