Navigation action cancellation The Request Manager allows users to cancel any navigation action they select from the application navigator by clicking another application navigator link. This allows users to cancel slow loading transactions without having to wait for the previous transaction to complete. One of the following conditions must be true for the Request Manager to cancel a transaction. Both the original transaction and new transaction are cancelable (both transactions have the setting sysparm_cancelable=true). The original transaction is a member of the always cancelable white list (the module is listed in the glide.request_manager.always_cancel system property) and the new transaction is cancelable (has the setting sysparm_cancelable=true). Both the original and new transaction produce an auto-completer query in a reference field. Cancellation workflow The Request Manager uses the following workflow to determine whether to cancel a transaction. Figure 1. Cancel navigation actions Add sites to the always cancel white listYou can add UI pages or other links to the always cancel white list so that users can cancel actions on these pages by navigating to another module or link.Prevent users from canceling module transactionsYou can explicitly prevent users from canceling a module's activity by updating the module definition.Navigation cancellation system propertiesAdministrators can control automatic cancellation behaviors with the following system properties. Use casesThere are three use cases where administrators can control user cancellation actions.