Remember font & size

Shall Scrivener remember the font & size among different folders in a project?
Also, can Scrivener show the font/size of the text when I open it next time?

I’m not exactly sure what you are looking for, what you mean by different folders, but just think of the program as being like pretty much any other word processor. If you change the font and come back to the file tomorrow it will still be the way you left it. The only somewhat unique thing about Scrivener in this regard is that it has an easy way to set up default fonts and paragraph formatting, for when creating new items in the binder. You can do that in other word processors as well, but it usually requires learning how to make and set the default template.

Also, is this is feature request, or are you looking for answer on how to do something?