After I upgraded Ubuntu MATE from 16.04 to 18.04, I noticed a really annoying behavior. Clicking in the empty area of a scrollbar (between the handle showing where your current position is and the up or down arrow) used to scroll up or down a page at a time. After the 18.04 upgrade, this behavior changed, and now it moves the handle directly to the position where you clicked. Some people like this, some people don’t. I don’t. Unfortunately, they didn’t decide to make this a configurable option in the graphical settings for some strange reason.
It turns out that this is actually a GTK 3 behavior — it’s caused because MATE recently changed to use GTK 3. Luckily, it’s an easy fix:
Go into the directory of the theme you are currently using. So for my current configuration, I went into this directory:
/usr/share/themes/Ambiant-MATE/gtk-3.0
Edit the “settings.ini” file. Add the following line to the bottom of it:
gtk-primary-button-warps-slider = false
Log out and back in, and you’re done.
thank you !!
al least i’ve disable this annoying function.