Resize A-Z scale

on the right hand side of the screen on my iPad there is a very useful tool to navigate: a vertical scale from “# to Z”.
By tapping egg. a “B” I can navigate to all artist names beginning with “B”
Unfortunately the precision to locate the desired character is not too good…

Please resize this scale or integrate a possibility to choose the width manually or installe a “mouse over” function to see at least what I am tapping.

Thank you for taking care of this issue

Regards Peter