You can customize most of design options on hover state you can enable by the little arrow that appear on hover on option group name.
Hover state in action
When enable hover for option group you will find a blue arrow beside the title. If an options group has hover options you will find a trash icon to delete hover options.
Hover state works well in the last example, but it’s too quick. Now we will add some transition to make a hover nice and slow.
Real World example
Use Effects options with hover options to make a better testimonials showcase.