The zoom in and zoom out button doesn't work as expected when the page is scrolled down.There are two issues here:
The button overlaps with the 'Back to top' option
Clicking on the zoom in/out doesn't work rather it scrolls to the top of the screen. The reason could be that the scroll to top button is spanned through the width of the screen.
Device: Nexus 4 Android 4.4.4
Thank you very much for your bug report. This is indeed a problem/bug.
I have transfered your ticket to the officiel Kiwix bug tracker system:
https://sourceforge.net/p/kiwix/bugs/738/
The zoom in and zoom out button doesn't work as expected when the page is scrolled down.There are two issues here: