It is possible to set the Fuji X-T3 to perform a pre-shoot function. This means that effectively the camera takes a picture before you do!
As you hold the shutter button half-way the X-T3 will start to take photos and store them in a buffer. Once you press the shutter all the way down to take a picture images before the shutter press are stored to card. This gives you a capture of the scene that you might have missed due to reaction time.
X-T3 Pre-Shot Function Settings
In the Shooting Setting menu, ensure that shutter type is set to Electronic Shutter - ES and enable pre-shot.
X-T3 Pre-Shot Examples
There were some butterflies darting about my garden this afternoon that made good subjects for the X-T3 Pre-Shot feature. Waiting for the butterfly to take-off and pressing the shutter button as soon as possible results in the X-T3 capturing the moment of take-off. This is something that I missed by some margin when pressing the shutter
This is a potentially useful feature for capturing that Cartier Bresson decisive moment