KDE Enlarge scroll bar width - how to?


under KDE,
what’s the procedure to enlarge/change the width of the vertical/horizontal scroll bar in Dolphin, Browser, Mousepad, etc.


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Unfortunately, if you have theming going on, by creating your own theme


Do not see that mentioned.

GTK, is easy:

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This feature is missing in Plasma at the moment. This is a link to a bug in the KDE bug tracker regarding this feature: 440749 – enlarge scrollbar width . I think the workaround for now would be to use a custom plasma theme.
The link @Fabby posted is a tutorial for Plasma4. This is the updated version for Plasma5: Creating a Plasma Theme Quickstart | Developer