TREX Administration Tool

Transaction Code: TREXADMIN
Provide the RFC Destination and execute.
You should see tabs such as:
Summary
Services (default)
Trace
Ini Files
Alert
RFC Monitor
Search
Index Landscape
Index Admin
Queue Administration
Version
and
Topology

There will be Advanced Mode, along with TREX ABAP Customizing button on the top which will give you more options/tabs to choose from.