Filter

Turns an active filter on and off. When this check box is selected, the list displays
only those layers that match the active filter. When this check box is cleared, the
full list of layers is displayed. (This option is available only when there is an
active filter.) To turn on an active filter, in the filter list, either enter a wildcard
and press Enter, or select a saved filter.

Layer List

If a filter is active, displays a list of layers defined in that filter. If no filter
is active, displays a list of layers in the drawing. Double-click a layer to set it
to Always Show (an asterisk to the left of the layer is displayed). Right-click in
the layer list to display more options.

In the layer list, you can

• Click a layer name to display the contents of a layer.
• Double-click a layer name to turn the Always Show option on or off.
• Press Ctrl and click layers to select multiple layers.
• Press Shift and click to select layers in a sequence.
• Press either Ctrl or Shift and double-click in the layer list to turn the Always Show
  option on or off.
• Click and drag in the layer list to select multiple layers.

  For more options in the layer list, right-click to access the Layer List shortcut
  menu.

Layer List Shortcut Menu Options

Displays a list of options for the layers selected in the Layer list.

Hold Selection

Turns on the Always Show option for selected layers. An asterisk (*) is displayed
to the left of each layer held.

Release Selection

Turns off the Always Show option for selected layers.

Release All

Turns off the Always Show option for all layers.

Select All

Selects and displays all layers.

Clear All

Clears all layers.

Invert Selection

Clears current layers and selects and displays all other layers.

Select Unreferenced

Selects all unreferenced layers. Use with the Purge button to remove unused layers.

Save Layer State

Saves the current selection of layers as a layer state that can be used by the Layer
States Manager.

Inspect

Displays the number of layers in the drawing, the number of layers selected, and the
number of objects on the selected layers.

Copy as Filter

Displays the name of the selected layer in the Filter text box. Can be used to create
wildcards.

Save Current Filter

Saves the current filter so that it is available in the Filter list for reuse.

Delete Current Filter

Removes the current filter from the filter list.

Select Objects

Selects objects and their layers.

Filter List

Filters the layer list. Enter a wildcard and press Enter to display and highlight
only those layers whose names match the wildcard. Right-click to save and delete filters.
The filter list displays saved filters only.

For more information about wild-card characters, see the Wild-Card Characters section
of Filter and Sort the List of Layers.

Purge

When selected layers are not referenced, purges them from the drawing. For a list
of layers that can be purged, right-click anywhere in the Layer list and click Select
Unreferenced. In the Layer list, the unreferenced layers are highlighted. You can
purge those layers.

Restore on Exit

Returns layers to their previous state when you exit the dialog box. If the check
box is cleared, any changes you made are saved.