A Forum can't exist, without a proper thread about cat shots Here is mine, during a winter walk with my cat. Feel free to share your cat-shot
X-T1 + 18-135 @ 135 + Crop
Yes you can - here is the manual section that describes the functions that can be assigned to buttons:
http://fujifilm-dsc.com/en/manual/x-s10/shortcuts/function_buttons/
Long story short: I had utterly blown out skies and reading about how to avoid them quickly led me to ND filters and all that kind of complicated stuff. Then I played with d range and d range priority mode of the x-t3. The latter gave me excellent results. If you shoot landscape and things with skies you have to try it if you havent already. Its incredible.