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782 Chapter 21: User Interface
Procedure
To undo changes to a perspective or orthogr aphic
viewpor t , do one of the foll owing:
•Right-clicktheviewportlabelandchoose
Undo. The type of Undo is specifically named
on the menu (for example, Undo Zoom
Extents).
•PressSHI F T+Z.
Note: Th is is different from ca mera and light
viewports, which require the use of Undo on
the mai n toolbar, or CTR L +Z.
Zo o m View port
Activate a Perspective or Or thog raphic viewport. >
Viewport Navigation controls > Zoom
Keyboard > Z turns on Zoom ; [ zooms in; ] zooms out
Keyboard > CT R L+ALT+middle mous e button
Roll your mouse scroll wheel.
Zoom adjusts view magnificat ion when you drag
in a Perspective or Orthog raphic viewpor t. By
default, the zoom is in and out of from the pointer
of your mouse.
Tip: If you use the Microsoft IntelliMouse or a
compatible pointing device, you can roll the wheel
to zoom in and out in the active viewport. The
zoom center is the current cursor position.
Zoom moves incrementally, based on the distance
between the Perspective view and its “vir tual
target,” an inaccessible hidden target used for
calculat ion pur poses only. Use the CTRL and ALT
keys to increase or decrease the increments. You
can move the virtual target by holding down the
SHIFTkeyduringazoomoperation.Otherwise
you will zoom increasingly closer to the target,
which w ill not move.
Procedures
To zoom a view:
1.
Activate a Perspect ive or Orthogr aphic
view por t.
2. Click Zoom.
The button highlights when it is on.
3. Drag in a viewport to change magnification.
• Drag up to increase magnification.
• Drag down to decrease magnification.
4. Press ESC or rig ht-click to turn off the button.
To increas e zoom sp eed:
• HolddownCTRLwhileyoudraginaviewport.
To decrease z oom speed:
• Hold dow n ALT while you drag in a viewpor t.
To turn on an automatic zoom mode:
• Onthekeyboard,holddownCTRL+ALT,then
holddownthemiddlemousebuttonanddrag
in a viewport. This does not activate the Zoom
button.
To zoom to the cursor position:
• On the k eyboard, press [ (left bracket) to zoom
in, and ] (right bracket) to zoom out.
Zoom A ll
Activate a Perspective or Orthog raphic viewport. >
Viewport Navigation controls > Zoom All
Zoom All lets you adjust view magnification in all
Perspective and Orthographic view ports at the
same time.
By default, Zoom All zooms in and out of the
center of the viewports.