Change color Expansion button

I’ve recently started using Opus and this is the VS "Dark Theme" is the first theme I am using. The only thing I have problems with is the expansion button color on the left side of the screen, this is about the same color as the background thus making it hard to see if the folder is expanded or not. I looked at the manual but cant find a setting to change this color. Is it possible?

In the screendump you can see the blue-colored expansion button, it changes to this color with a mouse-over, the other expansion buttons can't be seen due to the color of the background vs expansion color.

ExpansionButton

Try the options under Preferences / Folder Tree / Appearance / Tree style for different glyph styles.

Thanks Leo, didn't look there but the selection box "No Lines" did the trick! :grinning: