The Gallery Settings section in the Event theme Customizer contains 3 options. Navigate to Appearance → Customize → Theme Options → Gallery Settings to access these settings.

Options

• Gallery Per Page (Number) — Number of gallery items per page (1–100).
• URL Rewrite Slug (Text) — Custom URL slug for gallery items.
• Category URL Rewrite (Text) — Custom URL slug for gallery categories.

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