Where Am I option In Pega:

It is one of the debugging tool in Prpc Which displaysthe current position of work object in a flow.

ClipBoard: It is one of the main debugging tool in Prpc which is the visuals representaion of work object data

the current running Application is held on the clip board pages 

Each page on the clip board must refered to  one class.

pyWorkpage:It is the UI page created on the clip board by the process commander, which holds all the dat related to UI.

px   : we can read but we can't write

py:We can read and write

pz:no read and no write