The Slider Settings section in the Charitas theme Customizer contains 2 options. Navigate to Appearance → Customize → Theme Options → Slider Settings to access these settings.

Options

• Slides (Repeater) — Add slides for the homepage slider. Each slide has an image, title, description, button text, and URL.
• Revolution Slider Alias (Text) — Use Revolution Slider instead. Enter only the alias.

After making changes, click Publish at the top of the Customizer to save your settings.