The last four buttons in the Toolbar can be used to control the center of rotation. The appearance of this region of the Toolbar will depend on the state of the buttons. One possible configuration is shown below.
Using these buttons you can pick the center of rotation, reset the center of rotation, show or hide the marker, and edit the center of rotation coordinate value manually. These operations are explained below.
This button can be used to
interactively pick the center of rotation. After pressing this button,
the next mouse click in the Display Area will pick the new center of rotation.
The location of the center of rotation will be based on the data found
under the mouse position.
This button can be used to
reset the center of rotation to be the center of the currently active
data object. This is a useful operation to perform when you want to rotate
around a particular data object to view it from all directions.
This button has two possible
appearances based on the mode. When the button looks like the one shown
on the left (with a dot in the center), the center of rotation marker
is currently visible as red, green, and yellow lines that cross at the
center of rotation coordinate location. Pressing this button will lead
to two things. First, the center of rotation marker will become invisible.
Second, this button will change appearance to the one shown in the Toolbar
at the top of this page (without a dot in the center). Pressing the button
now will once again show the center of rotation marker and toggle the
appearance of this button.
This button can be used to
manually edit the center of rotation. By default it will appear as shown
in the Toolbar above with a small right facing arrow in the corner. Pressing
this button will lead to the interface seen on the right where the current
center of rotation coordinate is displayed and can be edited using the
text entry boxes. The button now has a left facing arrow, and when pressed
will hide the text entry boxes again.