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title: Change Appointment Details
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# Change Appointment Details

This section explains how you can show either the service resources or time slots page based on what the user chooses to change for the appointment. Depending on the requirement, you can choose one of the two options.

-   **[Change Appointment Candidates](https://developer.salesforce.com/docs/service/salesforce-scheduler-dev-guide/guide/uc7-change-appointment-candidates.md)**  


    If the assigned resources mark themselves absent, use the `query` request on the `ServiceTerritoryMember` object to show the list of alternative resources.

-   **[Change Appointment Time Slots](https://developer.salesforce.com/docs/service/salesforce-scheduler-dev-guide/guide/uc7-get-appointment-slots.md)**  


    A time slot represents a period in a day when an appointment takes place. a multi-resource service appointment can be modified. To show the alternative tome slots for the assigned resources, use the `getAppointmentSlots` REST API.