Kate also supports a minimap of the text contents instead of a classical scrollbar. To enable it, just go to
Here at the Randa meeting, we just invested some time to bring this minimap more in line with the Breeze style. You can see the difference here: Note the scrollbar slider frame, the new version (right) is more distinct and in line with the rounded corners of the Breeze style.
 Old Scrollbar Slider |  New Scrollbar Slider |
<p>
This change will be in the KDE Frameworks 5.24 release. If you want to support the KDE Randa developer meeting, please click on the banner :-)<br /> <a href="https://www.kde.org/fundraisers/randameetings2016/"><img class="aligncenter" src="https://www.kde.org/fundraisers/randameetings2016/images/banner-fundraising2016.png" width="1400" height="200" /></a>
</p>