This control has several styles in MahApps.Metro:
This is the basic style for the
Slider. It applies automatically if you don't use a custom style.
If you want to base your custom style on that style, you need to add
To use that style you need to load resource dictionary
<ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/Controls.FlatSlider.xaml" />
and explicitly set the style of the
This style could be dynamically changed to:
For that you need just to change TickPlacement property from None to any other.