To customize the fields displayed in the event popover of the Schedule Calendar in ServiceNow, navigate to System Scheduler > Schedule Pages and identify the relevant schedule configuration. Check the associated Schedule Source for the calendar, which determines the table and fields used. Then, go to System Scheduler > Schedule Sources, open the corresponding Schedule Source, and locate the configuration defining the popover content. This may be in the form of a JSON structure or a Script Include. Update the configuration to include or exclude the desired fields, such as title, description, start, and end. For instance, in a JSON structure, you can add key-value pairs like "title": "name" or "description": "short_description". If a Script Include is used, modify the script to fetch additional fields, such as event.description = gr.getValue('short_description'). Once the changes are made, refresh the calendar and verify that the event popover displays the updated fields.
