How to manage Slide in Decorme?

1.How do I manage  Content in Slider Section?

From your dashboard, go to the Appearance > Customize > FrontPage Sections > Slider Section

Here you can manage content of Slider Section

Now Click on Publish.

2.Manage Opacity of Slider Section?

From your dashboard, go to the Appearance > Customize > FrontPage Sections > Slider Section

Here you can manage Opacity.