Unable to change the font and position of Book collection short name button

Though it is good that we can hide/show the Book collection short name button at the top corner of book viewer but it’s format is unchangeable. It’s font and the position remains default.

Is there any setting for changing the default font, font size and the position of that button?
Screenshot 2022-02-02 080802

If it is not, then please consider this feature request for next update.

Please guide.