The “Grab” function is used to move the entire contents of a diagram, without having to select each element.
To use the “Grab” function, simply carry out the following steps:
Click inside the diagram whose contents you want to grab and move.
Hold down the mouse wheel button until you see the small hand icon appear.
Still holding down the right mouse button, drag the hand within the graphic editor. The entire contents of the diagram are then moved to wherever you move the mouse.