Viewing & Display Options
The Zoom options only apply to the display of the tunnel in the Tunnel Section View. The Zoom options are available in:
the toolbar
the Tunnel Section sub-menu of the View menu
the default right-click menu on the Tunnel Section View
the F2, F4, F5 function keys
rotate mouse wheel forward or backward
Zoom All
(a.k.a.
zoom extents, zoom limits) will zoom the tunnel so that all entities in
the view are visible.
Zoom In
will
increase the magnification so that the new view area is 90% of the old
view area.
Zoom Out
will
decrease the magnification so that the new view area is ~111% of the old
view area.
TIP: if you have a mouse with a wheel, you can Zoom In by moving the wheel forward, and Zoom Out by moving the wheel backward.