\page selection_filter_library_page Selection filter library
\n Selection filter library allows creating and storing in files
-filters that can be later reused for operations on meshes. You can
-access to it from the Main Menu via <b>Tools / Selection filter library</b>.
+the filters that can be later reused for operations on meshes. You can
+access it from the Main Menu via <b>Tools / Selection filter library</b>.
It is also possible to save any filter by invoking the filter library
from \a Filter dialog launched from any mesh operation.
\anchor filtering_elements
-When we use filters during a group creation or another operation (by
+When we use filters during group creation or another operation (by
clicking <b>Set Filter</b> button in the corresponding dialog), the
dialog for setting filters looks as shown below.
The \b Add button creates a new criterion at the end of the list of
criteria. The \b Insert button creates a new criterion before the
selected criterion. The \b Remove button deletes the selected
-criterion. The \b Clear button deletes all criteria.
+criterion. The \b Clear button deletes all criteria.\n
+If there is a choice of <b>Entity type</b> in the dialog, only
+criteria of currently selected type are used to create or change a
+filter, and criteria of hidden types (if were specified) are ignored.
\n Each <b>Entity type</b> has its specific list of criteria, however all
filters have common syntax. The <b>Threshold Value</b> should be specified
for most criteria. For numerical criteria it is necessary to indicate if
\ref area_page "Area quality control"), which is more, less or equal (within a given
<b>Tolerance</b>) to the predefined <b>Threshold Value</b>.
</li><li>
-<b>Free edges</b> selects 2D mesh elements having at least one of its
-edges not shared with other faces. See also a
+<b>Free edges</b> selects 2D mesh elements having at least one
+edge, which is not shared with other faces. See also a
\ref free_edges_page "Free Edges quality control".
</li><li>
<b>Free faces</b> selects 2D mesh elements, which belong to less than two volumes.
