Just a heads up for people that didn’t know. If you are having problems with focusing in dark situations or when using flash with the X-t1. (applies to other X models also)
When in really dark situations and using flash just turn off exposure preview and your viewfinder and screen become an OVF instead of an EVF that way you can see what the lens sees.
To turn off exp preview just go into setup menu 1 then choose the very last menu item “screen set-up” then the third menu item down “preview exp./wb etc.” and turn it off. Don’t forget to turn it back on when finished .
I am sure it is the same with other Fujifilm X models just in a different menu location.