Font sizes

I am very new to Scrivener, I purchased it last night. I need to increase the font sizes (old eyes). I have figured out how to di it in the main writing area, but really need to increase the font size in the top to bottom column on the left side of the screen. Is this possible?

Those fonts within the interface itself that can be changed are within the Appearance preference pane. You might want to just go through each section there in the respective “Fonts” tabs to get everything set up the way you like. The sidebar you are referring to by the way is called the “Binder”.