Body Elements

As with the X100, the X-Pro1 has an eye sensor by the viewfinder, allowing automatic switchover from the rear LCD when you bring the camera to your eye.

Unlike the X100, the X-Pro1 has no built-in diopter adjustment. Instead it requires screw-in correction lenses.
The lever that switches between optical and electronic viewfinder modes is placed for operation by your right middle finger. It points downwards, as opposed to up on the X100.
The X-Pro1 has a single, clickable rear dial, replacing both the X100's jog lever and dial around the 4-way controller. In conjunction with the new 'Q' button, it can be used to change a wide range of settings via an on-screen control panel (that's displayed both on the rear screen and in the viewfinder).
The 4-way controller is much improved, with separated directional keys and a larger, more positive 'OK' button.

The buttons have mainly been stripped of their control functions, with the sole exception of the 'up' key. The 'Macro' label indicates that it's used to enable close-distance focusing, switching over to the EVF in the process.
The camera's secondary controls - drive mode, metering pattern, and AF area selection - are consolidated onto a column of buttons down the left side of the LCD. These are also used in playback mode for image magnification and deletion.
In line with the camera's extensive provision of external controls, there's a dedicated switch for changing focus mode on the camera's front. It's of the rotary type (replacing the X100's fiddly linear switch), with the two most-used modes (single AF and Manual) at the extremes of its travel, where they're easiest to hit quickly.
The front plate plays host to an autofocus-assist LED, squeezed between two tiny holes for the stereo microphone that's used during video recording.
The X-Pro1 has no built-in flash, but there's a hotshoe on the top plate that has contacts for use with Fujifilm's dedicated external units. The small EP-X20 unit is designed specifically to complement the X-Pro1 (see below).
For studio flash work, there's also a PC socket tucked out of the way on the left side of the camera, below the three holes for the camera's built-in speaker. It has a little push-on cap, of the distressingly-easy-to-lose variety.
The usual HDMI and USB connectors are behind a hinged plastic door on the handgrip. Note that there's no microphone input for movie recording (this is primarily a stills camera, remember).
Like with the X100, the X-Pro1's tripod mount is placed right beside the battery/SD card door, meaning you won't be able to replace either with the camera on a tripod.

The X-Pro1 uses the blocky NP-W126 battery pack. In utterly conventional fashion it lives behind a base-plate door, which also provides access to the SD card slot. In less-conventional fashion it can be inserted either the wrong way round or upside-down and will still happily lock in place.

The SD card slot is very close to the compartment door, which users with large fingers may find fiddly.