Hi Gary,
Simple - you need to select 'TFC' (Traffic) from the list of options in blue at Top Left on the RADAR Screen by 'ticking' (clicking or touching in) the relevant blank box...
The Radar Screen will then display the traffic or whatever item(s) you have selected. (You can tick any or all of them, but if you select all your screen may get a bit crowded).
For info, the other setting options are... MET = METARs , RAIN = Rainfall Radar , POI = Places of Interest , and AIRFIELD is self evident.
Once selected, you can hide or display the Options List by toggling using the HIDE /DISP (Display) buttons to keep the screen clear.
Once selected and on display, you can then touch on an individual aircraft (or METAR) to bring up a window containing details of that aircraft or site METAR. Touching the screen again away from the detail window closes it again.
p.s. For the benefit of other users, I have adjusted the Main Thread Title to indicate that this issue has now been resolved, though users can of course still continue to post observations..
Best Regards
Peter