For some reason my EX1 does not show peaking anymore? Where and how do I get it work again? It was working but not sure when peaking was no longer working. The zebra is working fine though.
It's within one of the menus. Instruction manual explains where it is; for example, you can set the color of the peaking from within the menu and turn it on/off.
You need to have the aperture open to have enough light to get it to work. Sometimes when I'm stopped down I forget this aspect. Opening up "activates" it again.