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704 Chapter 8: Modifiers
Vertex—Turns on Vertex sub-object mode,
which lets you select a vertex beneath the cursor;
region selection selects vertices within the region.
Edge—Tur ns on Edge sub-object mode,
which lets you select a face or polygon edge
beneath the cursor; region selection selects
multiple edges within the region.
Polygon—Turns on Polygon sub-object mode,
whichletsyouselectasinglefaceorpolygon.A
polygon is the area you see within the visible wire
edges. Region selection selects multiple polygons
within the region.
Element—Turns on E lement sub-object
mode, which lets you select all contiguous
polygons beneath the cursor in the current level
of detail.
Ignore Backfacin g—When on, you can select only
those sub-objects whose normals are visible in
the viewport. When off (the default), selec tion
includes all sub-objects, regardless of the direction
of their normals. Default=off.
Only Curr ent Level—Displays only polygons at the
current level of detail, with highlights, but without
smoothing. Use this option to speed up the display
when working with complex objects. Default=off.
Subdivision Stack—Shows t he current level of the
subdivision hierarchy. Automatically increments
when you subdivide a sub-object selection. To edit
at a different level of detail, select the level in the
stack. The current level is outlined in red.
• Visibility is controlled by the box icon to the
right of the level label. Turning on the visibility
at one level act ivates the visibility from that
level down to the base level. Visibility above
thatlevelwillbeturnedoff.