You need to create a Download Page before performing its customization.

Please follow the below steps to create Download Page:

• Go to Pages> Add New
• Enter the Page Title
• Select the Template as Download Page
• Click on Publish

Please follow the below steps to perform Download Page settings:

• Go to Appearance> Customize> Download Page settings
• Enable Search Bar to display the Search Bar
• Select the number of Downloads per page to be displayed
• Click on Publish