Notepad++ Cosmetic Issue: Both Views Different Text Sizes?

Hi! I have a recent version of Notepad++: when Notepad++ asks to update, I usually say yes. Now, I have a very small cosmetic issue with the program: when I have open two views in one instance, the right view's text appears to be smaller than the left. I like it smaller and want the left view to be the same size as the right view. I can use the Zoom Out menu item--I think it's in the View menu--but am wondering why this is occuring.