default, it is Group_n.</li>
<li>Then, using the "Select" button, select the <b>Main Shape</b> (a
geometrical object on which the group will be created). </li>
-<li> <b>Select Sub-Shapes</b> button group lets you restrict the range
+<li> <b>Main Shape Selection restriction</b> button group lets you restrict the range
of group elements you operate with.
-<ul><li>\b All button enables work with all sub-shapes of the Main
+<ul><li> <b>No restriction</b> button enables work with all sub-shapes of the Main
Shape.</li>
-<li><b>In Place of Second Shape</b> restricts the range of accessible
+<li><b>Geometrical parts of the Second Shape</b> restricts the range of accessible
elements to those sub-shapes of the Main Shape that geometrically
coincide with the <b>Second Shape</b>.</li>
-<li><b>Sub-Shapes of Second Shape</b> restricts the range of
+<li><b>Only Sub-Shapes of the Second Shape</b> restricts the range of
accessible elements to those sub-shapes of the Main Shape that
are sub-shapes of <b>Second Shape</b>. This is useful because
sometimes purely geometrical coincidence is not enough and it
<li>Clicking <b>Select All</b> button you can add all object's
elements of a certain type in the list of the elements of the
group. If the <b>Second Shape</b> is used, the elements are added
-according to <b>Select Sub Shapes</b> setting. To delete elements
+according to <b>Main Shape Selection restriction</b> settings. To delete elements
from the list, select them and click \b Remove button.
</li></ul>
</li>
