Grab or Grabbing is an action performed by pressing the appropriate button when available.
This is one of the main actions for interacting with items in the game.
In rare cases, the Grab action is replaced by the Pick Up action. Pick Up functions the same as Grab.
You have to be close enough to the item and oriented in the correct direction for this action to appear to be able to Grab an item. Press the appropriate button and you will perform the grab action.