Hello wdodich,
to use the P-Buttons in your application, the P-Buttons have to be enabled first. This has to be done by going into the "Project View", clicking on your device and ticking the option "P-Buttons" in the "System Settings Tab". The default factory setting for this option is "disabled".
To simulate the P-Buttons change into the "Simulation View", click on "Display" in the left side window and select "Display and Buttons" from the appearing list. Now start the Simulation and click the desired arrow buttons (P comes from the german word for "arrow").
By the way, sometimes it's helpful to hit the F1-Key, easySoft normally comes with a build in context sensitive helpfile. Believe me, it's faster to look there first.
Best regards
Bernhard