That's a duplicate of the command Show All: it displays all the hidden objects.
Show Information
With this command, the information window below is displayed:
It is a duplicate of command Show Information (see Assembly Functions, chapter "Show Information")
Pan
That's a duplicate of the command Pan: it lets you pan the model in the graphic area by holding the left mouse button and moving it. To de-activate the function press ESC key.
Zoom
That's a duplicate of the command Zoom: it zooms in a window you draw on the screen.
Rotate
That's a duplicate of the command Rotate: it lets you rotate the model in the graphic area by holding the left mouse button and moving it. To de-activate the function presse ESC key.
Fit
That's a duplicate of the command Fit all: it adjust the zoom fitting the model view to the window, maintaining the orientation.
Zoom Window
That's a duplicate of the command Zoom window: it adjust the zoom fitting the model view to the window, maintaining the orientation.
OrientView
Once selected, a sub-panel is displayed:
That duplicates the Orientation toolbar to orient the model in the graphical area to the main working views (Top, Bottom, Left, Rear, Right, Front, Trimetric, Isometric)
Reset Rotation Point
That's a duplicate of the command Reset Rotation Point: it lets you set the new view rotation point of the current model.