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â– There is no naming convention for layer groups. Group names can include
spaces, non-alphanumeric characters, and both uppercase and lowercase
letters.
â– Xref layer groups cannot contain other filter groups.
Managing Layer Groups
You can add and subtract layers from layer groups. You can change the
standard AutoCAD properties for the layers in groups, rename layer groups,
delete layer groups, and change the filters in filter groups.
Types of Layer Filters
With the Layer Properties Manager, you can create three types of layer filters:
group filters, property filters, and layer standards filters.
Group filters can contain any layers in the current drawing. You can manually
add layers to, and remove layers from, group filters by dragging layers within
the Layer Properties Manager into the group filter or by selecting an object in
the drawing on the layer that you want to add to the group filter.
Group filters are considered static because they are not automatically updated.
They include only the layers that were assigned when the group was created.
You can manually add layers to, and remove layers from, group filters.
Property filters contain layers that meet filter criteria that you specify for the
group. Filter criteria can select layers according to layer states (on/off,
frozen/thawed, locked/unlocked), properties, or names. For example, you can
create a property filter that includes all of the red layers in the current drawing.
Property groups are considered dynamic because they are automatically
updated when you change the properties of layers that are part of the group.
Property filters are also updated when you add or modify layers that meet the
criteria specified in the filter. You cannot manually add layers to, or remove
layers from property filters.
The layer groups named Xrefs and All are created automatically.
Creating a Group Filter
Use this procedure to create a group filter. Group filters can contain any layers
currently listed in the Layer Properties Manager. You can manually add layers
to, and remove layers from, group filters by dragging layers within the Layer
Types of Layer Filters | 721
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