I expect that I can make a CSS file to personalize. So that I can define my own style.
At this point it cannot be supported. Perhaps later alternative themes will be available though.
Oh, sorry, maybe I do not say it clearly. I mean that when I want to use a CSS file in my note(like in html), I have to use the absolute path of the CSS file. But linux and windows have different path and different computer may also have different path, it is so inconvenient. When we change a computer, we should change the path in every note which use the path to point out where the CSS file is. If we can point it in the setting on the different computer and operation systems, we do not need to consider the path problem, it will be much better because we only need to change the setting when we use different computer or different operation system.