Overview When you need to conditionally hide or show fields in a SharePoint list or library form, there are two common approaches: enable content types or use JSON form customization. This post explains both and shows the visibility expression used in SharePoint. Option 1: Enable content types Enabling content types on a list or library gives you built-in controls for: showing or hiding fields reordering columns managing form layout per content type This is a good fit when your list or library uses multiple content types and you want form behavior to vary by type.