9

Use S election Center 447
Use S el ection Center
Main toolbar > Use Selec tion Center (on Use Center flyout)
The Use Selection Center button, available from
the Use Center flyout (page 1–445),letsyouenable
rotation or scaling of one or more objects around
their collect ive geometric center. If you tr ansform
multiple objects, the software ca lculates the
average geometric center of a ll the objects and uses
that for the transform center.
The axis tripod (page 1–424) shows the center that
is currently being used.
Note: Thetransformationcentermodeisseton
a transform-by-transform basis, so select the
transform before you select the center mode. If
you do not want the center setting to cha nge, turn
on Customize menu > Preferences > General tab >
Reference Coordinate System group > Constant.
With the Selection Center option, an averaged coordinate
system is used to rotate the objects.
Use Tra nsfor m Co ordina te Center
Main toolbar > Use Transform Coordinate Center (on Use
Center flyout)
The Use Transform Coord inate Center button,
available from the Use Center flyout (page 1–445),
lets you enable rotation or scaling of an object or
objects around the center of the current coordinate
system. When you designate another object as
thecoordinatesystemwiththePickfunction(see
Specif ying a Reference Coordinate System (page
1–435)), the coordinate center is the location of
that object’s pivot.
The axis tripod (page 1–424) shows the center that
is currently being used.
Note: Thetransformationcentermodeisseton
a transform-by-transform basis, so select the
transform before you select the center mode. If
you do not want the center setting to change, turn
on Customize menu > Preferences > General tab >
ReferenceCoordinateSystemgroup>Constant.
An example of the World coordinate center