As styling syntax was changing during development, I’m updating old examples for the latest Tabs Studio version 1.0.6.
Change tabs font family to Consolas and increase tabs font size to 12 points:
<Style TargetType="TabsStudio:Tabs" BasedOn="{StaticResource DefaultTabsStyle}">
<Setter Property="Control.FontFamily" Value="Consolas"/>
<Setter Property="Control.FontSize" Value="12pt"/>
</Style>
Custom tabs font family and size
Set Italic font style only for the selected tab name:
<Style TargetType="TabsStudio:TabName" BasedOn="{StaticResource DefaultTabNameStyle}">
<Style.Triggers>
<Trigger Property="IsTabSelected" Value="True">
<Setter Property="FontStyle" Value="Italic"/>
</Trigger>
</Style.Triggers>
</Style>
Italic font style for selected tab name
Tabs Studio Blog (organizing Visual Studio document tabs) 