I can't change the page of icons, i only have one font for every window screen this is the one where the window_options 
Viewing post in Hakuen Studio Font Manager for RPG Maker MV-MZ comments
You didn't answer my previous questions. And I don't understand what does mean the "page of icons".
If you just have one font to be used on all windows and scenes, on the scene list and window list parameters, leave them empty: "[]" (without quotes).
Otherwise, you will need to explain to me better what you want and what you are trying to do.
okay that's not what i want. I have two fonts, one for the title screen and the other one i want to use for all other things in the game. it works for all of them but the option screen even though i have listed every window even the options menu. My first font is hard to read that's why im using a second to make my game more readable.
On my understanding, you want to use two fonts: One exclusively for the title screen and another one for the rest of the things on the game.
The first font on the plugin parameters is the default font for all things.
So, let the first font be your default. You don't need to assign any window or scene into it. If it is the first, it will be the default for all.
Now, on your second font, apply that exclusively for the Title Screen. If you want to change the font for all things on the title screen, just apply it into the Scene_Title. If you want just for the Game Title, apply it just for it.