What are transport Requests?
Transport Request is a 10 character alphanumeric code having the syntax <SID>KXXXXXX where the SID is the System ID in which the transport request was created. Transport request contains a list of objects that can me moved between systems. Transport Requests is a way in which you can record changes and move them across systems.
Types of transport Requests:
Workbench requests and the tasks assigned to them are normally used to record changes to Repository objects and Customizing for all clients.
Customizing requests record client-specific Customizing settings made in a single client (the source client of the request).
Copying Transport Requests:
Consider there are two workbench requests as shown.
Select the request to which the objects are to be copied and press Ctrl+F11
Click the green tick or press Enter, you can find the object list added as shown.