Shortcut key for hiding the UI is ctrl+k.
I also feel like the camera needs to be positioned "higher."
Playing as the tall race the camera seems built for smaller characters and it doesn't seem to adjust itself for taller characters, so it's stuck too "low" and your body blocks what you need to see.
They just need to make the camera viewpoint take into account the character height, or at least give us a way to change it without having to zoom out, but like being able to alter it's height instead when looking over the shoulder.
Here's my first character, Jin Higashi (took the names of two of my favorite fighting characters, Jin Kazama and Joe Higashi)