We will be replacing the older version of Freshdesk with the new Mint experience on January 31, 2019. All your data and configurations will remain intact. Switching back to the old Freshdesk will not be possible. To read about this feature on Freshdesk Mint, refer to this article instead
This feature is currently not available on Freshdesk Mint.
This feature is not available on the old Freshdesk.
Go to the Tickets Tab > Click on the required ticket > Expand the 'Linked Tickets' panel on the extreme right > Create a new tracker or choose to link it to an existing tracker.
This feature is available only from the Pro/Garden Plan onwards in Freshdesk.