The Pro version of Tabs and Sliders provides several extra design features.
- Go to Extensions > Plugins
- Find and open the "Tabs and Sliders [for articles] Pro" plugin.
You will now be able to choose from several Pro templates:

You'll also be able to choose the color of your tabs:

Here's a visual overview of each template appears:
The Linear-Pro Template with Tabs

The Minimal-Pro Template with Tabs

The Plain-Pro Template with Tabs

The Setoff-Pro Template with Tabs

The Source-Pro Template with Tabs
