Commands and functions > Viewport > Zoom viewport
  
Zoom viewport
Ribbon:
Not present
Menu:
ATHENA > Viewport > Zoom viewport
Toolbar:
ATH Viewport > Zoom viewport
Command input:
ath_mf_vp_zoom
With this command you zoom the current viewport to a new display. You can specify the rectangular window defining the zoom display in any viewport.
Input request 
Specify first corner or [?]:
Use the mouse or enter coordinates to specify the first corner point of the zoom window. You can specify this point in any viewport.
With the option ? you call the help.
Select second corner or [?]:
Use the mouse or enter coordinates to specify the second corner point of the zoom window diagonally opposite.