[App_rpt-users] not as intuitive as EchoLink

Ok, I'm a new in-list-ment: and: I find the system cryptic... I'm running linux Mint 18.3 and firefox as a browser.. I can get the list pages for each of the nodes, BUT... HOW do I access the transmit/receive mode for them??? EchoLink has the connect function and a trans/rec togle , I see none on the list pages... Is there some software I need to download or just What special key do I push? WHAT AM I MISSING???