9

90 Chapter 3: Selecting Objects
Procedure
To select using a circle:
1.
Click the Circular Selection Region
button.
2. Drag in a viewport, then r
elease the mouse.
The first location you click is the center of the
circle, where you release the mouse defines the
circle’s radius.
To cancel the selection
,right-clickbeforeyou
release the mouse.
Fence S el ection R egio
n
Main toolbar > Fence S elec tion Region (Selection Region
flyout)
Edit menu > Select By > Fence Region
The Fence Selection Region option, available from
the Selection Region flyout (page 1–80) and the Edit
menu, provides one of five methods you can use
to select objects by region. The other metho ds
are Rectangular (page 1–89), Circular (page 1–89),
Lasso (page 1–90),andPaint (page 1–91).
You can use Fence to select either objects that are
completely within the selection region (window
method), or objects that are either within or
touched by the selection shape (crossing method).
Toggle between the window and crossing select ion
methods by using the Window/Crossing button
(page 1–93) on the main toolbar.
Note: If you hold down Ct rl while specifying
a region, the affected objects are added to the
current selection. Conversely, if you hold down
Alt while specif y ing a region, the affected objects
areremovedfromthecurrentselection.
Procedure
To select using a fence:
1.
Click the Fence Selection Region button.
2. Drag to draw the first segment of a polygon,
then release t he mouse bu
tton.
A "r ubber-band line" is no
w attached to the
cursor, anchored at the point of release.
3. Movethemouseandclicktodefinethenext
segment of the fence. You can make as many
steps as you want.
4. To complete the fence, e
ither click the first
point, or double-click.
A pair of cross hairs appears when you’re near
enough to click the first point. This creates a
closed fence.
Double-clicking crea
tesanopenfence,which
can select objects only by the crossing method.
To cancel the selection, right-click before you
release the mouse.
La ss o S electi on R egi on
Main toolbar > Lasso Selection Regio n (Selection Reg ion
flyout)
Edit menu > Select By > Lasso Region
The Lasso Selection method lets you select
multiple objects within a complex or irregular
region with a single mouse action.
The Lasso Selection Region option, available from
the Selection Region f lyout (page 1–80) and the Edit
menu,providesoneoffivemethodsyoucanuse
to select objects by region. The other metho ds
are Rectangular (page 1–89), Circular (page 1–89),
Fe nce (page 1–90),andPaint (page 1–91).
You can use Lasso to select either objects that are
completely within the selection region (window