-In this menu you can define the \b Name of the algorithm, the already
-meshed source \b Face and the \b Mesh (optional, use it if there are several
-different meshes on the same face). It could also be necessary to
-define the orientation of mesh on the face, which is done by
-indicating two <b>Source Vertices</b>, which belong to the same edge of the
-source face, and two <b>Target Vertices</b>, which belong to the same edge of
-the created \b Face.
+In this dialog you can define
+<ul>
+ <li> the \b Name of the algorithm, </li>
+ <li> the already meshed <b> Source Face </b> and </li>
+ <li> the <b> Source Mesh </b> (It can be omitted only when
+ projecting a submesh on another one of the same Mesh). </li>
+ <li> It could also be necessary to define the orientation of mesh on
+ the face, which is done by indicating two <b>Source Vertices</b>,
+ which belong to the same edge of the <b>Source Face</b>, and
+ two <b>Target Vertices</b>, which belong to the same edge of the
+ face being meshed.</li>
+</ul>
+
+The groups of faces are suitable for this algorithm only if they
+contain an equal number of faces and form topologically equal
+structures.
+
+\section projection_1D2D Projection 1D-2D
+
+\n <b>Projection 1D-2D</b> algorithm differs from
+\ref projection_2D algorithm in one aspect: it generates mesh segments
+on edges of the face according to the projected 2D elements; thus it
+does not require the edges to be meshed by any other 1D algorithm;
+moreover it does not allow to mesh edges of the face using another
+algorithm via definition of sub-meshes.
+
+\section projection_3D Projection 3D