How do you set a custom designer view as the default designer view for a widget?

Setting a custom designer view as the default designer view for a widget involves specific steps to ensure that the Sitefinity framework recognizes and prioritizes that view. The approach that involves creating a JSON file in the appropriate directory is correct because it follows the established convention used by Sitefinity for configuring widget designs.

By creating a JSON file named according to the convention "DesignerView.[DesignerViewName].json," you inform Sitefinity of the custom designer view's details. This includes specifying settings like the "priority" property, which determines how Sitefinity will prioritize different designer views available for that widget. Setting the priority to "1" indicates that this should be the default view, as lower numbers represent higher priority in Sitefinity's configuration hierarchy.

The other methods mentioned, while plausible, do not conform to how Sitefinity identifies and utilizes designer views. Creating a .cshtml file in the widget directory does not inform the system of priority or other necessary configurations directly. Modifying the widget's main configuration file might involve more extensive changes and doesn't strictly follow the preferred convention for designer views. Lastly, using Sitefinity's backend interface allows for certain configurations but may not inherently set a specific designer view as the default without the associated JSON file specifying priority. Thus, the chosen