Finding Items
   
Select the nodes in which the text "player" has to be found
Also set the direction and the Case sensitivity

On pressing the Find Next (F3) will focus the cursor on the node on the tree which
contains the text "Player"

subsequent search will go to the next occurrence until end/start of the document is
reached

Replacing Items
   
will replace "Player1" with "Player2" in the current selection

Replace All will replace all the found "Player1" items with "Player2"