Click on Mark as Resolved icon to the left of a ticket that is open in order to resolve it.
Click on Reopen icon to the left of a ticket that is already resolved to reopen it.
You can also click on the Mark as resolved/Reopen button on the top right corner of the ticket details page to resolve/reopen it.
How to merge tickets
Go to CRM Portal>> Ticket Listing
Click on the Merge to existing ticket icon to the left of a ticket
The condition for merging:
The source and the target tickets must have the same type (or the source ticket has NO type - in this case, it can be merged into a ticket with any type)